There are many reasons for breast spots, which can be divided into endocrine disorder or pigmentation. When you find spots on breasts, if it is accompanied by itching, pain, flaking and other uncomfortable symptoms, it is recommended to go to the hospital for examination and diagnosis in order to achieve early detection and early treatment. 1.Pigmentation: During the normal development of female breasts, some women will have spots on breasts due to pigmentation. 2.Pregnancy: Endocrine hormone changes in pregnant women may lead to skin pigmentation on breasts, and the outward appearance is spots on breasts. 3.Skin allergy: The skin of female breasts and skin care products and clothing can cause spots on breasts. 3, skin allergies: the skin of the female breast area and skin care products, clothing and other allergens in contact with the phenomenon of breast spots. 4, breast eczema: the cause is unknown, and allergies, breastfeeding stimulation and other situations related to the nipples, areolas and their surroundings, the patches are clearly bounded, brownish red, with vesicles, scales or thin scabs, prone to cracking. Some patients will also have itching pain. 5, pemphigus foliaceus: a superficial fungal disease caused by Malassezia infection epidermal stratum corneum. The typical symptom is that the skin pigmentation of the affected area is reduced or deepened, thus forming a discoloration. 6.Breast cancer: one of the typical manifestations of advanced breast cancer is the appearance of orange-like skin on the breast, which will be mistaken for discoloration in the early stage because it is different from normal skin. In addition, some systemic skin diseases and friction stimulation may also lead to spots on the breast. After spots appear, first of all, we should keep the skin of the breast clean, ensure loose and breathable clothing, and not to use medication without authorization during the period.