Changes

August 2026 — reviewed. A literature search was conducted in April 2026 to identify evidence-based guidelines, UK policy, systematic reviews, and key randomized controlled trials published since the last revision of the topic. No major changes to clinical recommendations have been made. The recommendations on follow up in primary care have been amended to reflect pragmatic clinical practice. CTS-6 is recommended to support diagnostic decisions and referral for nerve conduction studies should be reserved for atypical cases and diagnostic uncertainty. The basis for recommendation sections have been updated with current evidence in the literature. Information regarding the Tinnel sign updated to reflect a recent systematic review. 

Update

Goals

• Make a diagnosis of carpal tunnel syndrome.
• Offer appropriate management of carpal tunnel syndrome in primary care.
• Offer referral to an appropriate specialist if needed (such as a musculoskeletal service, rheumatologist, orthopaedic surgeon, hand surgeon, or neurologist), depending on local referral pathways.

Outcome measures

No outcome measures were found during the review of this topic.

Audit criteria

No audit criteria were found during the review of this topic.

QOF indicators

No QOF indicators were found during the review of this topic.

QIPP - Options for local implementation

No QIPP indicators were found during the review of this topic.

NICE quality standards

No NICE quality standards were found during the review of this topic.

What is it?

• Carpal tunnel syndrome is an entrapment neuropathy caused by compression of the median nerve in the carpal tunnel at the wrist [RCS, 2017; Genova, 2020; Padua, 2023; AAOS, 2024].
  • The carpal tunnel is an anatomical compartment bounded on three sides by carpal bones and on the palmar side by the transverse carpal ligament. It contains the median nerve and the flexor tendons.
  • Reduction in the dimensions of the carpal tunnel or increase in the volume of its contents produces an intermittent or sustained high pressure in the tunnel, which causes ischaemia of the median nerve and impairs nerve conduction, leading to pain and paraesthesia in the distribution of the median nerve.

How common is it?

Carpal tunnel syndrome (CTS) is the most common entrapment neuropathy of the upper limb [RCS, 2017; Padua, 2023].

• A study from the UK General Practice Research Database in 2000 calculated the incidence in males to be 88 per 100 000 and in females to be 193 per 100,000, with new presentations being most frequent at ages 45–54 years in females and 75–84 years in males [Latinovic, 2006].
• A large UK observational analysis of cross-sectional studies of primary care data over a 20-year period (1993–2013) found [Burton, 2018]:
  • The prevalence and incidence of CTS increased over the study period.
  • The female-to-male prevalence ratio decreased over time from 2.74 in 1993 to 1.93 in 2013.
  • The median age of females and males with CTS was 54 and 59 years, respectively, in 2013.
• A 2024 meta-analysis showed that approximately 14.4% of the global population experiences CTS. Furthermore, the review showed that the prevalence of CTS was 11.4% in low‐ and middle‐income countries and 16.9% in high‐income countries [Gebrye, 2024].
• A 2021 cross-sectional survey in a metropolitan city in China involved 969 respondents (aged 17-49 years) from 30 workplaces. A questionnaire was distributed to each participant to collect their demographic, work-related physical and psychosocial factors, and wrist and hand symptoms. The findings were: [Feng, 2021]
  • The prevalence of wrist symptoms, including numbness and pain, was 22%; 18% of the participants reported hand/finger numbness and 15% complained of hand/finger pain.
  • The study found that the clinically confirmed (signs, no electrical testing) CTS prevalence was 9.6%. The prevalence of wrist and hand symptoms were 22% and 15%, respectively. The prevalence rates of clinical CTS for male and female workers were 8.4% and 10.3%, respectively.

What causes it?

The majority of cases of carpal tunnel syndrome (CTS) are idiopathic, with no known underlying cause [] [Genova, 2020].

Potential risk factors for its development include:

• Activities where there is a high hand/wrist repetition rate; repetitive fine motor tasks, wrist flexion or hand elevation, such as [Genova, 2020; AAOS, 2024; Rotaru-Zavaleanu, 2024]: 
  • Gardening, assembly line work (such as some packing tasks), and occupations requiring forceful or repetitive hand grip/exertion [RCP, 2009; AAOS, 2024].
  • Use of vibrating hand tools [RCP, 2009; Genova, 2020; AAOS, 2024].
  • Occupational hand exposure carries an increased risk of developing CTS [Tabatabaeifar, 2024].
  • Note: there is a lack of consistent evidence in the literature regarding the link between CTS and computer work [Mediouni, 2015; Hassan, 2022].
• Obesity [; Genova, 2020; AAOS, 2024]. See the CKS topic on Obesity for more information.
• Pregnancy (there is an increased incidence compared to non-pregnant women), thought to be a consequence of increased volume in the tunnel following a change in fluid equilibrium [RCS, 2017; Genova, 2020; Bland, 2023].
• Osteoarthritis of the metacarpophalangeal (MCP) joint of the thumb, due to compression of the median nerve by osteophytes   [Wipperman, 2016]. See the CKS topic on Osteoarthritis for more information.
• Inflammatory joint disease, such as rheumatoid arthritis, due to synovitis in the carpal tunnel [RCS, 2017; Genova, 2020; Birsanu, 2024; AAOS, 2024]. See the CKS topic on Rheumatoid arthritis for more information.
• Ganglion cysts, tumour, scar tissue [].
• Hypothyroidism [RCS, 2017; ; Harinesan, 2024]. See the CKS topic on Hypothyroidism for more information.
• Diabetes mellitus [RCS, 2017; ]. See the CKS topics on Diabetes - type 1 and Diabetes - type 2 for more information.
• Amyloidosis [Milandri, 2020].

What is the prognosis?

Carpal tunnel syndrome (CTS) symptoms may resolve spontaneously in people [Sevy, 2023].

• A prospective follow-up study of untreated people with idiopathic CTS (n = 196) found that [Padua et al, 2001]:
  • Good prognostic indicators included short duration of symptoms, young age, and CTS due to pregnancy.
  • Poor prognostic indicators included bilateral symptoms and a positive Phalen's test.
• A prospective study of 132 untreated people followed up for an average of 2 years found [Ortiz-Corredor, 2008]:
  • On patient-completed symptom questionnaires, in 23.4% of cases the severity of symptoms worsened, in 28.8% symptoms remained stable, and in 47.6% symptoms resolved.
  • Following nerve conduction studies, in 7.6% there was electrophysiological deterioration, in 67.4% disease was stable, and in 25% nerve compression had objectively improved.
• A 2011 study compared patients with carpal tunnel syndrome who were scheduled for surgical release but did not proceed to surgery to patients who underwent surgery, matched on preoperative symptom scores [Pensy, 2011]:
  • Symptom and function scores improved for the surgical (n = 24) and non-surgical (n = 36) groups (p less than 0.001).
  • Improvement in symptom scores was greater in surgical patients compared to non-surgical patients (n = 24 matched pairs; p = 0.007), but improvement in function scores between groups was not significantly different (p = 0.13).
  • For surgical patients, function and symptom scores improved by 6 months and were unchanged at 6 years.
• Approximately 70% to 90% of mild-to-moderate CTS cases positively respond to conservative management. Nevertheless, many patients may progress to the point where surgical intervention becomes necessary [Sevy, 2023].
• Patients with CTS that are secondary to diabetes or a wrist fracture often have a less favourable prognosis compared to individuals with no apparent underlying cause [Sevy, 2023].

What are the complications?

• Carpal tunnel syndrome can impact daily functioning and sleep due to symptoms of pain, paraesthesia, muscle weakness, and impaired dexterity [RCS, 2017; Genova, 2020; Sevy, 2023].
• Sustained high pressure on the median nerve can lead to constant, severe symptoms with persistent sensory and motor deficits [RCS, 2017; Sevy, 2023].
• Surgical treatment may also have complications, such as neuroma [Sevy, 2023].

How should I assess a person with suspected carpal tunnel syndrome?

If a diagnosis of carpal tunnel syndrome (CTS) is suspected:

• Ask about:
  • The onset, duration, site, severity, and impact of symptoms.
    • Typical symptoms include intermittent paraesthesia, numbness or altered sensation, and burning or pain in the distribution of the median nerve (the thumb, index finger, middle finger, and radial half of the ring finger).
    • Symptoms may affect one or both hands.
    • Some people may present atypically, for example, with sensory changes in all fingers, or with pain in the hand radiating up into the wrist, forearm, or shoulder.
    • Symptoms are often worse at night and can wake people from sleep.
    • Relieving factors include changing hand posture or shaking the wrist ('the flick sign').
    • There may be loss of grip strength, hand weakness, and reduced manual dexterity, for example when doing up buttons, holding objects, and opening jars.
    • Severe disease may cause persistent symptoms and neurological deficit (constant sensory deficit, or thenar muscle wasting and weakness).
  • Additional conditions or risk factors for developing CTS.
  • Any previous episodes and treatments tried.
  • Any history of trauma or red flags which may suggest an alternative diagnosis.
• Examine the person:
  • Examine the entire upper limb, including neck, shoulder, elbow, and wrist to exclude an alternative diagnosis, particularly if there is an atypical presentation.
  • Assess for typical signs which are more likely with prolonged or severe symptoms, such as:
    • Trophic ulceration at the tips of the digits (rare, indicating loss of protective sensation).
    • Wasting of the thenar eminence muscles.
    • Sensory loss in the distribution of the median nerve.
    • Weakness of thumb abduction and opposition; reduced hand grip and pinch grip strength; reduced hand co-ordination.
  • Perform hand provocation manoeuvres which may support a diagnosis of CTS.
    • Phalen’s test — positive if flexing the wrist for 60 seconds causes pain and paraesthesia in the median nerve distribution.
    • Tinel's test — positive if tapping lightly over the median nerve at the volar surface of the wrist produces paraesthesia or pain in the median nerve distribution. Performing this test with a tendon hammer/percussion hammer greatly improves the accuracy. 
    • Durkan's test (carpal tunnel compression test) — positive if direct pressure over the proximal edge of the transverse carpal ligament (proximal wrist crease) with the thumbs produces or worsens paraesthesia in the median nerve distribution.
• Consider the use of a diagnostic tool such as CTS-6 to support history and examination.
• Consider the need for additional investigations, if a specific underlying cause is suspected.
• Be aware that referral for nerve conduction studies is not usually needed if there are typical symptoms of CTS. Consider arranging a referral, depending on local referral pathways, if:
  • The diagnosis is uncertain.
  • Referral for surgical management is being considered. See the section on Management for more information.

What else might it be?

Alternative conditions which may present similarly to carpal tunnel syndrome include:

• Cubital tunnel syndrome
  • Ulnar nerve compression at the elbow causes paraesthesia of the little and ulnar half of the ring finger, weakness of the small muscles of the hand but not the thumb, and there may be rapid weakening of hand grip.
• Cervical nerve root entrapment
  • Radiculopathy, especially at C6/7 level, may present with neck pain, with radiation of pain and numbness to the arm and hand in a dermatomal distribution to the thumb and index finger. See the CKS topic on Neck pain - cervical radiculopathy for more information.
• De Quervain's tenosynovitis
  • This presents with pain over the distal radial styloid due to irritation of thumb tendons when they run through the fibrous sheath.
• Osteoarthritis
  • Osteoarthritis of the metacarpophalangeal (MCP) joint of the thumb may present with pain on activities requiring thumb pinch with twisting action, such as opening jars or turning keys. There may be a positive 'grind test' (applying pressure towards the wrist joint and twisting reproduces pain). See the CKS topic on Osteoarthritis for more information.
• Inflammatory arthritis
  • There may be prolonged morning stiffness and signs of joint swelling and synovitis on examination. See the CKS topic on Rheumatoid arthritis for more information.
• Trigger thumb
  • There may be pain and a palpable nodule over the palmar aspect of the MCP joint, with clicking on thumb flexion.
• Vibration white finger or hand-arm vibration syndrome
  • There may be a history of use of vibratory hand tools and Raynaud's phenomenon. See the CKS topic on Raynaud's phenomenon for more information.
• Raynaud’s syndrome
  • See the CKS topic on Raynaud's phenomenon for more information.
• Thoracic outlet syndrome
  • Neurovascular compression in the thoracic outlet may cause shoulder and neck pain with associated finger numbness.
• Peripheral neuropathy
  • This may be due to conditions such as diabetes mellitus, hypothyroidism, and B12 deficiency, and there may be bilateral lower limb involvement. See the CKS topics on Diabetes - type 1, Diabetes - type 2, Hypothyroidism, and Anaemia - B12 and folate deficiency for more information.
• Motor neurone disease or multiple sclerosis
  • See the CKS topic on Multiple sclerosis for more information.
• Fracture
  • This may be suggested if there is a history of trauma.
• Peripheral nerve or other tumour
  • There may be rapidly progressive symptoms, with severe pain and swelling.

Scenario: Management of carpal tunnel syndrome

From age 16 years onwards.

Search strategy

Scope of search

A literature search was conducted for guidelines, systematic reviews and randomized controlled trials on primary care management of carpal tunnel syndrome.

Search dates

May 2021 - April 2026

Key search terms

Various combinations of searches were carried out. The terms listed below are the core search terms that were used for Medline.

• Exp Carpal tunnel syndrome/
• Exp Median Nerve/
• (“Carpal tunnel” or “carpal tunnel syndrome$).ti,ab.
• Carpal adj tunnel.kw.

Sources of guidelines

• National Institute for Health and Care Excellence (NICE)
• Scottish Intercollegiate Guidelines Network (SIGN)
• Royal College of Physicians
• Royal College of General Practitioners
• Royal College of Nursing
• NICE Evidence
• World Health Organization
• Guidelines International Network
• TRIP database
• Agency for Healthcare Research and Quality
• National Health and Medical Research Council (Australia)
• Royal Australian College of General Practitioners
• British Columbia Medical Association
• Canadian Medical Association
• Alberta Medical Association
• Michigan Quality Improvement Consortium
• Singapore Ministry of Health
• National Resource for Infection Control
• RefHELP NHS Lothian Referral Guidelines
• Medline (with guideline filter)
• Driver and Vehicle Licensing Agency
• NHS Health at Work (occupational health practice)

Sources of systematic reviews and meta-analyses

• The Cochrane Library:
  • Systematic reviews
  • Protocols
  • Database of Abstracts of Reviews of Effects
• Medline (with systematic review filter)
• EMBASE (with systematic review filter)

Sources of health technology assessments and economic appraisals

• NIHR Health Technology Assessment programme
• The Cochrane Library:
  • NHS Economic Evaluations
  • Health Technology Assessments
• Canadian Agency for Drugs and Technologies in Health
• International Network of Agencies for Health Technology Assessment

Sources of randomized controlled trials

• The Cochrane Library:
  • Central Register of Controlled Trials
• Medline (with randomized controlled trial filter)
• EMBASE (with randomized controlled trial filter)

Sources of evidence based reviews and evidence summaries

• Drug and Therapeutics Bulletin
• TRIP database
• Central Services Agency COMPASS Therapeutic Notes

Sources of national policy

• Department of Health
• Health Management Information Consortium (HMIC)

Patient experiences

• Healthtalk
• BMJ - Patient Journeys

Sources of medicines information

The following sources are used by CKS pharmacists and are not necessarily searched by CKS information specialists for all topics. Some of these resources are not freely available and require subscriptions to access content.

• British National Formulary (BNF)
• electronic Medicines Compendium (eMC)
• European Medicines Agency (EMEA)
• Medicines and Healthcare products Regulatory Agency (MHRA)
• REPROTOX
• Scottish Medicines Consortium
• Stockley's Drug Interactions
• TERIS
• TOXBASE
• Micromedex
• UK Medicines Information

Stakeholder engagement

Our policy

The external review process is an essential part of CKS topic development. Consultation with a wide range of stakeholders provides quality assurance of the topic in terms of:

• Clinical accuracy.
• Consistency with other providers of clinical knowledge for primary care.
• Accuracy of implementation of national guidance (in particular NICE guidelines).
• Usability.

Principles of the consultation process

• The process is inclusive and any individual may participate.
• To participate, an individual must declare whether they have any competing interests or not. If they do not declare whether or not they have competing interests, their comments will not be considered.
• Comments received after the deadline will be considered, but they may not be acted upon before the clinical topic is issued onto the website.
• Comments are accepted in any format that is convenient to the reviewer, although an electronic format is encouraged.
• External reviewers are not paid for commenting on the draft topics.
• Discussion with an individual or an organization about the CKS response to their comments is only undertaken in exceptional circumstances (at the discretion of the Clinical Editor or Editorial Steering Group).
• All reviewers are thanked and offered a letter acknowledging their contribution for the purposes of appraisal/revalidation.
• All reviewers are invited to be acknowledged on the website. All reviewers are given the opportunity to feedback about the external review process, enabling improvements to be made where appropriate.

Stakeholders

• Key stakeholders identified by the CKS team are invited to comment on draft CKS topics. Individuals and organizations can also register an interest to feedback on a specific topic, or topics in a particular clinical area, through the Getting involved section of the Clarity Informatics website.
• Stakeholders identified from the following groups are invited to review draft topics:
  • Experts in the topic area.
  • Professional organizations and societies (for example, Royal Colleges).
  • Patient organizations, Clarity has established close links with groups such as Age UK and the Alzheimer’s Society specifically for their input into new topic development, review of current topic content and advice on relevant areas of expert knowledge.
  • Guideline development groups where the topic is an implementation of a guideline.
  • The British National Formulary team.
  • The editorial team that develop MeReC Publications.
• Reviewers are provided with clear instructions about what to review, what comments are particularly helpful, how to submit comments, and declaring interests.

Patient engagement

Clarity Informatics has enlisted the support and involvement of patients and lay persons at all stages in the process of creating the content which include:

• Topic selection
• Scoping of topic
• Selection of clinical scenarios
• First draft internal review
• Second draft internal review
• External review
• Final draft and pre-publication

Our lay and patient involvement includes membership on the editorial steering group, contacting expert patient groups, organizations and individuals.

Evidence exclusion criteria

Our policy

Scoping a literature search, and reviewing the evidence for CKS is a methodical and systematic process that is carried out by the lead clinical author for each topic. Relevant evidence is gathered in order that the clinical author can make fully informed decisions and recommendations. It is important to note that some evidence may be excluded for a variety of reasons. These reasons may be applied across all CKS topics or may be specific to a given topic.

Studies identified during literature searches are reviewed to identify the most appropriate information to author a CKS topic, ensuring any recommendations are based on the best evidence. We use the principles of the GRADE and PICOT approaches to assess the quality of published research. We use the principles of AGREE II to assess the quality of published guidelines.

Standard exclusions for scoping literature:

• Animal studies
• Original research is not written in English

Possible exclusions for reviewed literature:

• Sample size too small or study underpowered
• Bias evident or promotional literature
• Population not relevant
• Intervention/treatment not relevant
• Outcomes not relevant
• Outcomes have no clear evidence of clinical effectiveness
• Setting not relevant
• Not relevant to UK
• Incorrect study type
• Review article
• Duplicate reference

Organizational, behavioural and financial barriers

Our policy

The CKS literature searches take into consideration the following concepts, which are discussed at the initial scoping of the topic.

• Feasibility
  • Studies are selected depending on whether the intervention under investigation is available in the NHS and can be practically and safely undertaken in primary care.
• Organizational and Financial Impact Analysis
• Studies are selected and evaluated on whether the intervention under investigations may have an impact on local clinical service provision or national impact on cost for the NHS. The principles of clinical budget impact analysis are adhered to, evaluated and recorded by the author. The following factors are considered when making this assessment and analysis.
  • Eligible population
  • Current interventions
  • Likely uptake of new intervention or recommendation
  • Cost of the current or new intervention mix
  • Impact on other costs
  • Condition-related costs
  • In-direct costs and service impacts
  • Time dependencies
• Cost-effectiveness or cost-benefit analysis studies are identified where available. 

We also evaluate and include evidence from NICE accredited sources which provide economic evaluations of recommendations, such as NICE guidelines. When a recommended action may not be possible because of resource constraints, this is explicitly indicated to healthcare professionals by the wording of the CKS recommendation.

Declarations of interest

Our policy

Clarity Informatics requests that all those involved in the writing and reviewing of topics, and those involved in the external review process to declare any competing interests. Signed copies are securely held by Clarity Informatics and are available on request with the permission of the individual. A copy of the declaration of interest form which participants are asked to complete annually is also available on request. A brief outline of the declarations of interest policy is described here and full details of the policy is available on the Clarity Informatics website. Declarations of interests of the authors are not routinely published, however competing interests of all those involved in the topic update or development are listed below. Competing interests include:

• Personal financial interests
• Personal family interest
• Personal non-financial interest
• Non-personal financial gain or benefit

Although particular attention is given to interests that could result in financial gains or losses for the individual, competing interests may also arise from academic competition or for political, personal, religious, and reputational reasons. An individual is not obliged to seek out knowledge of work done for, or on behalf of, the healthcare industry within the departments for which they are responsible if they would not normally expect to be informed.

Who should declare competing interests?

Any individual (or organization) involved in developing, reviewing, or commenting on clinical content, particularly the recommendations should declare competing interests. This includes the authoring team members, expert advisers, external reviewers of draft topics, individuals providing feedback on published topics, and Editorial Steering Group members. Declarations of interest are completed annually for authoring team and editorial steering group members, and are completed at the start of the topic update and development process for external stakeholders.

Competing interests declared for this topic:

None.