Primary hyperhidrosis refers to a significant increase in sweating caused by excessive sympathetic hyperactivity or abnormal sweat gland secretion, not caused by hyperthyroidism, tumors, fever and endocrine disorders. Zhu Yanjun, Department of Thoracic Surgery, Air Force General Hospital, refers to secondary hyperhidrosis, which is caused by other diseases, such as hyperthyroidism, tumor, fever, endocrine diseases and endocrine disorders during menopause. Contact: 010-66928352 What is primary hand sweating? What is secondary hyperhidrosis?