Sweating under the armpits may be caused by physiological reasons such as high activity, high temperature and breathable clothing, or by disease factors such as hyperhidrosis, which can be solved by medication, surgery and physical therapy. 1. Physiological factors: attention should be paid to timely change of clothing, clean clothing and skin, wearing breathable clothing. 2. Hyperhidrosis Drug treatment: the sweat glands can be destroyed by drugs or inhibit the secretion of sweat from the sweat glands in the armpit, such as 2%~4% formaldehyde solution, 20% aluminum chloride anhydrous ethanol solution and other topical drugs, or injections of botulinum toxin type A drugs for treatment. Surgical treatment: such as sweat gland excision, etc., can reduce the number of sweat glands, so as to achieve the relief of the symptoms of old underarm sweating. Physical therapy: such as high-frequency electroacupuncture, microwave radiofrequency, etc., mainly through the photoelectric technology, help to destroy the sweat glands, so as to inhibit the secretion of underarm sweat. In addition, it is recommended to wear breathable clothes, bathe frequently, keep the armpits clean and dry, and eat less spicy and stimulating food. If necessary, consult a doctor in time and adopt corresponding treatment measures under the doctor’s guidance, avoiding the use of drugs privately.