Numbness of the limbs refers to the limbs of the external stimuli, such as cold, heat, pain and other sensations of the abnormal, weakened or disappeared, it is often in the patient’s subjective sensations of the main complaint, the following diseases are common in the clinic: First, transient cerebral ischemia: This is a common cause of numbness of the hands of the elderly. Elderly people often have high blood pressure, high blood pressure will cause vascular spasm, high blood fat will cause vascular sclerosis, coupled with the elderly blood viscosity will increase, sleep and slow blood flow, these factors will lead to the occurrence of transient cerebral ischemia and cause hand numbness. Therefore, the elderly should check their blood pressure and blood fat regularly, and if they have high blood pressure or high blood fat, they should be treated. Usually drink more water, take some medicine, reduce blood viscosity, prevent thrombosis, improve cerebral blood supply, hand numbness phenomenon will be eliminated. Second, cervical spondylosis: cervical spondylosis is a common disease of middle-aged and elderly people, it is due to cervical spine osteophytes, intervertebral disc degeneration or local joint ligament laxity of the cervical spine local blood vessels, nerve tissue pressure and caused by its symptoms, a variety of manifestations, numbness of the hand is one of its symptoms. The cervical spondylosis, do cervical spine X-ray can be diagnosed, the treatment measures have physical therapy, traction and application of blood circulation drugs. Usually, you can always do some slow activity of the neck health exercises, and pay attention to sleep pillow height should be appropriate, generally 7-9 cm high, not too high or too low, hard and soft to moderate, sleep posture should be correct, to avoid the cervical spine local blood vessels and nerve tissue pressure and lead to numbness of the hands. Third, diabetes: diabetes will produce a variety of complications, diabetic peripheral neuropathy is one of them, once this complication occurs, there will be numbness of the limbs and feeling abnormal symptoms. Suffer from diabetes mellitus, to carry out regular and reasonable treatment, blood sugar control to normal range, and pay attention to supplement vitamin B1, B6, vitamin C, but also with the application of ginkgo biloba preparation, chuanxiongxizine and other drugs, numbness of the limbs will be eliminated. Fourth, peripheral neuritis: peripheral neuropathy, characterized by numbness of the terminal nerves like wearing gloves or socks after sensory loss, this disease is mostly caused by the lack of vitamin B1, or by drugs and heavy metal poisoning, after appropriate treatment, generally 2-6 months can be cured. However, the phenomenon of finger numbness, if it lasts too long or aggravation of symptoms, should not be paralyzed, because the elderly appeared on one side of the thumb numbness, often is the omen of cerebral stroke, should be to the hospital to check the blood pressure, blood lipids, blood glucose and fundus (the best please neurologist to check in detail) in order to prevent the problem before it occurs. Nerve damage: 1, ulnar nerve damage ulnar nerve of the forearm and upper arm by trauma, compression or tumor, can cause numbness and pain of the little finger and ring finger on the same side and part of the finger activity disorders. The ulnar nerve groove at the back of the elbow is more vulnerable to injury or compression. Most of them will recover gradually about half a year after the injury, but if there is a tumor, complete fracture or severe compression, surgery is often needed. The median nerve of forearm and upper arm can be damaged due to trauma, tumor and compression, which may cause numbness and pain on the palm surface, thumb, forefinger, middle finger, etc. In the wrist, it is most likely to be damaged. In the wrist is most vulnerable to damage or pressure, called carpal tunnel syndrome. The principle of treatment is the same as before. 3, radial nerve damage in the lower and middle part of the upper arm lateral flexor nerve is more likely to be damaged, the back of the thumb and index finger numbness and pain and fingers, wrist droop. The treatment principle is the same as before. 4, brachial plexus nerve damage in the armpit or anterior cervical lesions or injuries can cause ulnar, median, flexor nerve damage in whole or in part of the mixed symptoms. The treatment principle is the same as before. Sixth, spinal cord disease: when the spinal cord has inflammation, tumor or trauma, etc., it can be manifested as numbness of one limb and weakness of the other limb, or as numbness and weakness of the lower part of the body. Seven, parathyroid disease: some people’s fingers or toes often appear intermittent numbness or twitching, when serious, can spread to the whole body, for many years; sometimes can be good for a period of time, can also be the old disease recurs. This symptom is likely to be a sign of parathyroid disease. Hypoparathyroidism can be caused by damage to or ischemia of the parathyroid glands, most often due to thyroid surgery or due to an autoimmune disease, and when a large amount of calcium enters the bones and causes hypocalcemic convulsions, which can be temporary or last for months and years. The most obvious manifestation is tetany due to increased neuromuscular stress. In the early stages of the disease there is only abnormal sensation, tingling and numbness of the extremities, spasms and rigidity of the hands and feet. When the blood calcium is reduced to a certain level, tetany symptoms often appear, the fingers of both hands are flexed inward to form an “eagle’s claw”, and thereafter the feet are also a tonic extension, in severe cases, the whole body skeletal muscle, smooth muscle can also be spasmodic, accompanied by laryngeal spasm, bronchial spasm, asthma, laryngeal tinnitus, asphyxia, respiratory apnea, and other critical phenomena. Myocardial involvement can be tachycardia, septal muscle spasm, sometimes with uh-oh. All the above symptoms can be triggered by infection, overwork and emotions. Women are also prone to attacks around the time of menstruation. When the blood calcium is 7-8 mg, there are no obvious clinical symptoms, which is called hidden tetany. Eight, arm nerve compression: sleep if the posture is not correct, neck tilt or arm pressure, arm nerve compression will cause hand numbness, then as long as a different position to sleep, move the arm, numbness can be eliminated. Nine, overdose: the application of certain drugs overdose, such as gentamicin, will occur lips and limbs numbness side effects, to pay attention to avoid overdose.