The most common reason for middle and index finger numbness is carpal tunnel, which means the median nerve in the wrist and hand has an injury, according to Pain and weakness in the hand and wrist are other sy... More »

Ulnar nerve compression, carpal tunnel syndrome and peripheral neuropathy can each cause numbness of the fingers of the left hand, states the Mayo Clinic. Numbness of the fingers is rarely a sign of a life-threatening co... More »

Causes of numbness in the thumb include carpal tunnel syndrome and de Quervain's tendinitis, according to MedicineNet. Numbness in the thumb generally occurs due to a condition that affects the nerves or blood vessels th... More » Health Conditions & Diseases

Symptoms of rheumatoid arthritis in the fingers include numbness, deformities in the joints, and finger pain, swelling and stiffness, notes WebMD. The finger and wrist joints are the common targets for rheumatoid arthrit... More »

Patients can exercise arthritic hands by holding them upright, bending the joints of the thumb and fingers, touching the index finger to the thumb and spreading fingers outward, as listed by WebMD. These exercises can ef... More » Health Conditions & Diseases

Nerve damage due to poor blood circulation or a neurological disorder is often the cause of numbness in the tip of an index finger, states Mayo Clinic. Conditions such as carpal tunnel syndrome, diabetes and multiple scl... More »

A C5-C6 disk protrusion or herniation can cause weakness in the biceps muscle and pain, numbness and tingling down from the biceps through the lateral side arm and into the thumb and index finger, explains the University... More »