It is possible that excessive back sweating alone is an individual difference or sympathetic nerve damage. The distribution of sweat glands in the human body is not very balanced, usually the head, neck and chest sweat glands are more, but there are some people who have developed back sweat glands because of abnormal development, this kind of people’s back sweating is a physiological activity. The secretion of sweat glands is controlled by sympathetic nerves, and the sympathetic nerves of the back sweat glands originate from the sympathetic ganglion of the cervical medulla. In addition, calcium deficiency may also induce increased sympathetic excitability and hyperhidrosis, so a serum electrolyte test can be done to rule out calcium deficiency. If necessary, an MRI of the cervical medulla and a routine examination of the cerebrospinal fluid can be done to rule out cervical medulla tumors or inflammation.