Underarm odor may be caused by physiological reasons, such as not paying attention to hygiene, etc.; it may also be caused by pathological reasons, such as armpit odor, etc., which can be improved by general treatment, medication, invasive treatment and so on. 1. Physiological factors: if you don’t take a shower or change clothes for a long time, it can make the armpit emit odor. In this case, we should strengthen the hygiene management, need to do diligent bathing, change clothes, the symptoms can be relieved by themselves. 2. Pathological factors, commonly found in armpit odor and other diseases. The disease is the secretion of sweat glands at the top of the armpit, which is decomposed by bacteria and produces a special odor, which may be related to heredity and so on. If the symptoms are not serious, it can be improved by bathing diligently and changing clothes; it can also be treated with formaldehyde solution, trichlorodiphenyluria and other antibacterial treatments under the guidance of a doctor. For patients with severe symptoms, local injection of botulinum toxin type A can be prescribed to inhibit the secretion of the parietal sweat glands, or under the guidance of a doctor to perform surgical treatment such as parietal sweat gland excision. It is recommended that patients with underarm odor go to the regular hospital in a timely manner, after a clear diagnosis, under the guidance of the doctor for the cause of the symptomatic treatment, such as the need for medication, you need to follow the doctor’s instructions.