Carpal Tunnel Syndrome Diagnosis

Carpal tunnel syndrome is usually diagnosed using:

• Your medical history. The doctor will ask about any medical problems or illnesses, prior injuries, current symptoms, or daily activities that may be causing your symptoms.
• A hand diagram. You may be asked to help fill in a diagram of your hand to show where you have numbness, tingling, or pain.
• A physical exam. This includes comparing the strength of both hands.

More testing

If your symptoms are severe, if nonsurgical treatment hasn't improved symptoms, or if your symptoms aren't clearly caused by carpal tunnel syndrome, your doctor may recommend:

Nerve testing.

This checks the median nerve.

X-rays.

These can check for bone problems caused by past injury, arthritis, recently broken or dislocated bones, or tumors. X-rays aren't used to diagnose carpal tunnel syndrome. But they can be helpful for finding signs of arthritis or an old or new wrist or neck injury that may be adding to your symptoms.

Ultrasound.

This test looks at the size of the median nerve. The test doesn't cost much, and it's comfortable and quick. But its use for carpal tunnel syndrome diagnosis is still unproven and fairly uncommon.

MRI.

This imaging test can find swelling of the median nerve, narrowing of the carpal tunnel, or problems with circulation of blood through the carpal tunnel.

Blood tests.

These are sometimes done to check for a thyroid problem, rheumatoid arthritis, or another medical problem.