Numbness of both hands may be physiological factors, but also may be the manifestation of certain diseases, such as peripheral neuritis, spinal cord cervical spondylosis, internal diseases, etc., should be timely consultation to identify the cause of the disease. 1. Physiological factors: It is possible that the sitting or sleeping posture is incorrect, long-term pressure to a certain part of the blood circulation caused by poor, so leading to numbness of the hands. 2. Pathological factors (1) Peripheral neuritis: if it is caused by poisoning, infection, metabolism, etc., the numbness of both hands may appear. (2) Spinal cervical spondylosis: lesions of the cervical spinal cord can cause numbness of the hands, accompanied by neck pain and swelling, head heaviness, head and other sensations. (3) Internal diseases: such as diabetes, anemia complicating peripheral nerve damage, numbness of the hands can occur, electrolyte disorders can also occur. Numbness of both hands may also be related to carpal tunnel syndrome, elbow tunnel syndrome, drug intoxication and other diseases. If the symptoms of numbness in both hands have not been relieved, you should consult a doctor in time to clarify the cause of the disease, and if necessary, carry out the appropriate examination.