Numbness and pain in the hand is a common symptom in hand disorders, and it often suggests a nerve entrapment in the upper extremity. Main etiology Upper extremity nerve entrapment One is numbness and pain in the thumb, index and middle finger, often with a history of numbness and waking up at night, which can be improved by activity after waking up. Severe cases can be accompanied by hand muscle atrophy, affecting the fine movements of the hand, which is due to the compression of the median nerve at the wrist, the so-called “carpal tunnel syndrome”; second is the numbness and pain of the ring and little fingers, which can also have a history of nighttime numbness and awakening, and severe cases are accompanied by muscle atrophy, and the flexion force of the ring and little fingers is reduced, affecting the fine use. This is because the nerve is stuck in the elbow, that is, the so-called “elbow canal syndrome. Cervical spondylosis The most common disease that causes hand numbness is cervical spondylosis, which is one of the most common diseases in middle-aged and elderly people. When people enter middle age, some organs tend to degenerate, and when cervical disc degeneration occurs, it often leads to cervical disc protrusion or joint protrusion hyperplasia or hypertrophy, and once these protruding cervical discs or hyperplastic joint protrusions compress the adjacent cervical nerve roots, cervical spondylosis occurs. In addition to numbness and abnormal sensation in the fingers, cervical spondylosis is also accompanied by other symptoms, such as pain in the bones of the neck and shoulders, radiating pain in the upper limbs or movement disorders. It is not difficult to confirm the diagnosis of cervical spondylosis, just take an X-ray film. There is also a simple way to check cervical spondylosis, a person to hold the patient’s side of the head, one hand to hold the patient’s side of the upper limb, the abduction of 90 °, both hands simultaneously push and pull in the opposite direction, there is radiating pain or numbness can initially confirm the diagnosis of cervical spondylosis. Stroke Another common disease that causes numbness in the hands is stroke. The “Health Treasure Book – Stroke” has said: “Anyone who first feels numbness in the first finger and second finger or does not use it, has a stroke within three years.” Must be prevented: should be careful living, diet, far from the house, broad emotions. Although numbness of the fingers does not necessarily lead to stroke, for middle-aged people over 40 years old, if they often have headache, dizziness, heavy head and feet, numbness of the limbs, swelling of the tongue and other symptoms, and the patient usually has hypertension, hyperlipidemia, diabetes, cerebral arteriosclerosis and other diseases, they should pay more attention to be alert to the occurrence of stroke. Menopausal syndrome Women who enter menopause sometimes have numbness in their hands, but it is not obvious and will disappear with the end of menopause. In conclusion, the diagnosis of hand numbness requires cervical spine films, electromyography and other ancillary tests to make a definite conclusion. Once the diagnosis is confirmed, if the symptoms are still light, then by regular non-surgical treatment, can have different degrees of improvement, if the symptoms are obvious, and there is a significant atrophy of the inner hand muscle, should be promptly taken to surgery to stop the development of the disease, so as not to cause irreversible and serious atrophy of the inner hand muscle, resulting in serious hand dysfunction. The causes of numbness in the hands and feet are: 1, is suffering from diabetes will appear numbness in the hands and feet, mainly due to vascular disease. 2, is a drug or chemical agent caused by numbness. 3, is the numbness caused by neuritis. 4.Numbness in the four extremities in a scattered manner. Local nerve stimulation, such as drunken stroke, coma caused by nerve stimulation to the head, cervical spondylosis caused by numbness of the upper limbs, lumbar shoulder nerve stimulation caused by numbness of the legs, etc.. 5, is the numbness caused by tumor and other compression of nerves. 6, is ionic disorders, acid-base imbalance, endocrine disorders, psychological factors, etc..