The itchy black skin around the areola is considered to be caused by friction stimulation, eczema, bacterial infection and other factors. 1. Friction stimulation: often wear tight underwear, underwear material is rough, repeated local friction, stimulation, resulting in melanin precipitation. Chest sweat more, underwear material is not breathable, sweat stimulation leads to local itching. 2. Eczema: Eczema is prone to occur in the allergic population, with a variety of internal and external factors. For example, mental stress, excessive fatigue, external stimuli, heredity and other factors, resulting in localized pimples, papules with itching, dark red patches. 3. germs infection: itchy, black skin around the areola, but also to understand whether it is related to germs infection. Disease-causing microorganisms infection, can cause inflammatory reaction, resulting in subcutaneous melanin precipitation. Disease-causing microorganisms cause irritation to the skin, leading to itching. Darkening of the color around the areola, it is recommended to visit the dermatology department of the hospital to find out whether it is related to a disease. Medications can be given to address the cause of the disease in conjunction with the doctor’s advice.