Hand numbness this situation, most people will also encounter, different types of hand numbness is not the same reason, so it is very necessary to understand the real reasons about hand numbness, so then you can clearly appreciate the changes in their bodies Oh. Causes of numbness in the hands and feet are the following: 1, vascular factors When we sit for a long time or sit in a bad posture, it will cause numbness in the lower limbs, when the hand is put in the wrong position will also be numb, a relaxation, such as millions of ants crawling. Because when the blood vessels are compressed, the blood vessels supply the limb part of the ischemia, causing numbness, and so on a moment to lift the compression, blood flow over, it feels like there are many ants crawling. When the upper limb ulnar artery, radial artery tube in a place of compression, will cause hand numbness. When the nerve is compressed, the flow of axial pulp is impeded, which can also cause numbness in the hand. There are mainly radial nerve, ulnar nerve and median nerve to the palm of the hand, these nerves start from the cervical spinal canal, through the joints, ligaments, bone fiber canal to reach the end of the palm of the hand, in any part, the nerve is compressed, will cause numbness in the hand. 3, brain factors All nerves are derived from the brain, when the brain problems. Such as a stroke, the area governed by the brain will appear numbness, weakness. 4, systemic factors excessive lipids: long-term high blood lipids, easy to cause hardening of the blood vessel wall, coupled with high blood lipids, blood viscosity, blood flow becomes slower, the cells get less oxygen nutrients, resulting in numbness. Diabetic patients: blood sugar to maintain a high level, for a long time, the human blood vessels, nerves caused great damage, vascular sclerosis, nerve degeneration. 5, the cervical spine caused by hand numbness cervical nerve has intervertebral foramen out, divided into two branches before and after. Anterior branch: towards the lower outer side, until the forearm, forming the ulnar nerve, radial nerve, median nerve, etc. Posterior branch: It goes around the posterior joint of the cervical spine to the posterior side and is distributed to the muscles behind the cervical spine. Hand numbness is a very common disease of the hand, and occasional hand numbness due to prolonged pressure and pain is understandable. But if the frequent occurrence of hand numbness should be taken seriously, should be promptly to the regular hospital diagnosis and treatment.