Everything You Need to Know About Carpal Tunnel Syndrome: Diagnosis and Solutions

Carpal tunnel syndrome (CTS) is the most common peripheral nerve entrapment syndrome, occurring when the median nerve becomes compressed as it passes through the carpal tunnel, a narrow passageway in the wrist formed by the wrist bones and the transverse carpal ligament. The median nerve provides sensation to the thumb, index finger, middle finger, and part of the ring finger while helping control several muscles at the base of the thumb. When the nerve is compressed, it can cause pain, numbness, tingling, weakness, and reduced hand function that often develop gradually over time.

Many people first notice symptoms while typing, using hand tools, driving, gripping objects, or performing other repetitive hand movements. Symptoms frequently become worse at night because sleeping with the wrist bent can increase pressure within the carpal tunnel. Some people wake up with their hand “asleep,” shake it to relieve the tingling, or begin dropping objects because of reduced grip strength. As the condition progresses, prolonged nerve compression may weaken the thenar muscles at the base of the thumb, making everyday tasks such as buttoning clothing, opening jars, or holding small objects more difficult.

Carpal tunnel syndrome develops when pressure increases within the carpal tunnel and compresses the median nerve. Risk factors include repetitive hand use, prolonged keyboard or mouse use, vibrating hand tools, wrist injuries, pregnancy, diabetes, obesity, rheumatoid arthritis, thyroid disorders, and inflammation around the wrist. Similar symptoms may also result from conditions such as cervical radiculopathy, cubital tunnel syndrome, pronator syndrome, or peripheral neuropathy, making an accurate diagnosis essential before treatment begins.

Early diagnosis is important because prolonged compression of the median nerve can lead to permanent nerve damage, persistent numbness, muscle weakness, and loss of thumb function. A comprehensive physical examination may include tests such as the Phalen test and Tinel sign, with nerve conduction studies (NCS) or electromyography (EMG) recommended when additional confirmation is needed or another condition is suspected.