Hand numbness refers to numbness in one or both hands caused by damage to the sensory nerves of the limbs or poor blood circulation at the end of the body due to various reasons. Hand numbness after bathing may be due to cervical spondylosis, peripheral blood circulation disorders, cerebrovascular disease, etc. 1, cervical spondylosis: some patients have cervical spondylosis, like to rub the bath with their heads down, easily lead to nerve root compression, hand numbness, this hand numbness will generally be gradually relieved after the activity; 2, peripheral blood circulation disorders: the temperature in the bathroom is relatively high when bathing, there may be sweating, loss of body fluids Resulting in a drop in blood volume, so that the peripheral blood circulation disorders, resulting in peripheral nerve malnutrition, temporary hand numbness, generally after drinking water symptoms will be alleviated; 3, cerebrovascular disease: If the elderly, or people with previous chronic diseases, such as hypertension, diabetes, etc., the bath water temperature is higher, sweating more, causing a drop in blood volume, resulting in insufficient perfusion of local cerebral blood flow, so that brain tissue ischemia Lack of oxygen, if the ischemic brain tissue happens to dominate the fingers, the symptoms of hand numbness will appear, with unilateral hand numbness mostly. If the unilateral hand numbness persists after bathing, it is recommended to go to the hospital in time to improve the head CT, cerebral hemogram and other examinations.