Numbness in the hands and feet is caused by poor peripheral blood flow, and the phenomenon of tingling due to insufficient local blood supply to the hands and feet. Numbness in the hands and feet is a symptom that often occurs in people’s daily life, such as pregnancy, incorrect sleeping position, squatting in the toilet for a long time can be triggered. Usually it will be eliminated in a short time and will not be a major problem. However, some people with tingling hands and feet for a long time (more than a day) can not be relieved, it may be a sign of a disease in the body. Causes of numbness in the hands and feet are related to the following situations: 1, oppressed when the sleeping posture, sitting posture is not correct, the limbs for a long time in a state of compression, it is easy to feel numb, or even no sensation. This is generally a normal situation, there will be no big problem, the activity will soon ease over, do not need to care too much. 2, cold frozen human body has a degree of induction of temperature, more than the human body induction of the cold state, hands and feet sensory nerve failure, manifested as numbness of the hands and feet, no sensory symptoms. Frozen for too long, will cause permanent tissue necrosis in the area. 3, diabetes if the hands and feet are not compressed and there is regular numbness, this is to consider whether it is caused by diabetes. Diabetes can also cause soreness and swelling in the body, especially in the elderly, with special attention. 4, drugs some drugs or chemicals in certain circumstances will also make the hands and feet numb, such as Huang Lian Su, dysentery two drugs after taking the situation of numbness in the hands and feet. If you stay too long in the environment containing hydrogen, arsenic, carbon disulfide, etc., it will also lead to numbness in the hands and feet. Therefore, you must be careful to take the medicine, do not go to the vicinity of the chemical plant to play, walk. 5, neuritis neuritis can cause damage to the nerves in various parts of the body, so that the function can not travel normally, the response to various parts of the more sluggish, so it will lead to numbness in the hands and feet, muscle atrophy, limb weakness and other symptoms. 6, nerve stimulation nerve stimulation is usually followed by localized numbness, not numbness in the hands and feet at the same time, such as cervical spondylosis leading to numbness in the arms, lumbar shoulder nerve stimulation leading to numbness in the legs and so on, are caused by localized stimulation leading to numbness in specific areas. 7, drugs reflecting antihypertensive drugs, cardiac drugs, neuroleptic or paralytic drugs can cause local numbness in the limbs, please follow the doctor’s instructions to take. 8, physical stimulation burns, heavy hammering, tapping, etc. can cause numbness in the hands and feet, symptomatic treatment can be. Numbness in the hands and feet at first may have little impact on life and work, so it is easier to be ignored, if allowed to develop, it will lead to the aggravation of the disease, numbness for an increasingly long time, and finally may lead to paralysis, so it must be taken seriously.