Carpal tunnel syndrome

Pressure on the median nerve

Carpal tunnel syndrome develops when pressure inside the wrist affects the median nerve. This nerve carries feeling from the thumb, index finger, middle finger, and part of the ring finger. It also supplies muscles that help position the thumb for pinch. The carpal tunnel is a passage bounded by wrist bones and a ligament. Swelling within that passage can interfere with nerve function.

A change in sensation can make ordinary tasks difficult. Fastening a button, holding a steering wheel, or picking up a coin may require extra attention. The location of the symptoms helps identify which nerve needs examination. Symptoms involving the little finger may point to a different source, so describing the exact pattern matters.

Symptoms and daily activities

Tingling that interrupts sleep can be a sign of carpal tunnel syndrome. A bent wrist during sleep or while holding a phone may bring on symptoms. Shaking the hand can provide temporary relief. As nerve function changes, numbness can persist through the day and the hand may feel clumsy.

Thumb weakness deserves an assessment. Difficulty opening a package can reflect pain, reduced sensation, or a change in muscle strength. Visible thinning at the base of the thumb can indicate advanced nerve involvement. An examination helps separate these findings from arthritis, tendon pain, and nerve problems arising at the neck or elbow.

Examination and nerve testing

Diagnosis begins with the symptom history and a hand examination. The clinician checks feeling, thumb strength, and the response to positions that place pressure on the nerve. Tell the clinician when symptoms started, which fingers are affected, and whether the hand wakes you from sleep. Mention diabetes, thyroid disease, pregnancy, previous wrist injury, and prior treatment.

Nerve conduction studies and electromyography can help locate nerve dysfunction and assess its severity when the diagnosis or treatment decision requires clarification. Ultrasound can provide information about the nerve and nearby structures. The choice of testing depends on the examination. Bring earlier test reports so that changes can be reviewed alongside your current symptoms.

Splinting and other nonsurgical care

A wrist splint that holds the wrist in a neutral position can reduce pressure during sleep. Fit matters: a splint should support the wrist while allowing comfortable finger movement. Adjusting a work surface or changing how you hold a tool can also reduce positions that provoke tingling. Persistent symptoms should prompt reassessment of the plan.

A corticosteroid injection can reduce symptoms for a period of time, although symptoms may return. Discuss diabetes, medication use, and prior injections before treatment. Exercises may be selected for your examination findings. Forceful stretching through tingling can irritate the nerve, so ask for specific guidance about the movements appropriate for your hand.

Carpal tunnel release

Carpal tunnel release creates space for the median nerve by dividing the ligament over the tunnel. Surgery may be considered when symptoms continue despite nonsurgical care or when the examination suggests nerve damage. Open and endoscopic approaches reach the ligament through different incisions. The choice depends on your anatomy, clinical findings, and the surgeon's assessment.

The discussion should include anesthesia, incision care, and the work you need to resume. Risks include infection, tenderness, stiffness, nerve injury, and symptoms that persist or return. A severely affected nerve may recover incompletely. The purpose of release is to relieve pressure; the degree of sensation and strength recovered depends on the condition of the nerve.

Recovery and follow-up

Recovery includes protecting the incision while restoring comfortable hand use. Finger movement, wound care, and lifting limits follow the instructions provided after surgery. Pressure through the palm may remain uncomfortable while the tissues heal. Ask when driving, gripping a tool, and returning to your specific job will be appropriate.

New weakness or constant numbness warrants timely evaluation. Sudden severe pain, an injured wrist with changing sensation, or fingers that become cold or discolored need urgent assessment. Before your visit, write down the tasks affected and the treatments you have tried. These details help connect the treatment decision to sleep, work, and hand function.

A symptom diary can record whether tingling occurs during sleep, driving, or tool use. Include whether changing wrist position helps and whether feeling returns fully between episodes.