ANATOMY AT A GLANCE
The median nerve passes through the carpal tunnel at the wrist. Compression can cause tingling and numbness.
Typical symptoms
Night-time tingling often affects the thumb, index and middle fingers and the thumb-side half of the ring finger. Persistent numbness, reduced strength or muscle loss at the thumb base need prompt assessment.
How is the cause assessed?
An examination assesses sensation, strength and the affected fingers. Nerve conduction testing or ultrasound may be added when needed. The typical pattern alone does not establish a diagnosis.
Consider other causes
Not every numb hand has carpal tunnel syndrome. Other nerve compression problems can cause similar symptoms; the affected fingers and associated symptoms help guide clinical assessment.
Treatment options
Without surgery
A night splint that keeps the wrist straight can help. Depending on the findings, hand therapy, activity changes or a clinician-guided injection may be considered.
Surgical options
Progressive symptoms, persistent numbness or muscle weakness need specialist assessment. Surgery relieves pressure by releasing the ligament over the tunnel.
Suitable treatment depends on the confirmed diagnosis, examination findings and your individual needs.
When to seek an examination
Arrange an examination for recurring night-time tingling. Persistent numbness, reduced strength or muscle loss at the thumb base need prompt assessment.
Sources & editorial status
British Society for Surgery of the Hand (BSSH)
American Society for Surgery of the Hand (ASSH)
IN-DEPTH PATIENT GUIDE
Carpal tunnel syndrome: the complete PDF guide
Arrive prepared – keep important symptoms and questions at hand.
It can be hard to remember everything during an appointment. Use the PDF guide to prepare at your own pace and record your information in the spaces provided:
- Record your symptoms: Note your symptoms and how they change, so important details are less likely to be overlooked during the conversation.
- Prepare for your doctor’s questions: Think ahead about the information that will be important to discuss.
- Bring your own questions: Write down what you would like to clarify and take your notes to the appointment.
You also receive illustrated information about the condition and treatment options.
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