Armpit hyperpigmentation may be caused by physiological phenomenon, generally no need for treatment; may also be caused by inflammation, acanthosis nigricans, obesity and other factors, need to treat the original disease. If you feel that it affects the aesthetic appearance, you can remove it by using drugs to lighten the pigment, or take laser to remove it. 1. Under normal circumstances, there is a certain amount of pigmentation in the armpits of the human body, the color is brown, light brown, etc., which is a physiological phenomenon and does not require special treatment, usually strengthen the skin can be sunscreen. 2. Some people have bacterial or fungal infection in the armpits, and obvious pigmentation remains after inflammation; or obvious pigmentation in the armpits may be caused by acanthosis nigricans, obesity, etc. First of all, it is necessary to control the original disease, such as anti-inflammatory, weight control, and endocrine conditioning. 3. If you feel that underarm hyperpigmentation obviously affects the aesthetic appearance, you can use local topical drugs to lighten the pigmentation, such as hydroquinone cream, vitamin E cream, retinoic acid ointment, and so on. You can also use laser whitening to destroy underarm melanin and improve skin metabolism, so as to achieve the effect of removing underarm hyperpigmentation. In addition, usually avoid underarm skin long-term friction, try to wear loose and breathable clothing, pay attention to keep local clean. It is recommended that patients who want to remove underarm hyperpigmentation go to a regular hospital for treatment by a professional doctor and follow the doctor’s instructions for medication.