Finger and hand numbness can have a variety of causes ranging from damage caused by alcoholism and diabetes to nerve damage and a brachial plexus injury, according to the Mayo Clinic. Finger numbness can also be a sympto... More » Health Pain & Symptoms

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 » Health Conditions & Diseases

To determine the cause of finger numbness, doctors typically ask the patient about symptoms such as accompanying sensations and the location, origin and duration of the numbness, according to Healthgrades. Tests includin... More » Health Pain & Symptoms
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Causes of numbness in the thumb include carpal tunnel syndrome, alcoholism, Lyme disease and multiple sclerosis, notes Mayo Clinic. Other possible causes of numbness in the thumb include amyloidosis, peripheral neuropath... More » Health Pain & Symptoms

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 » Health Pain & Symptoms