Itchy breasts in summer may be related to localized airtightness, allergies, nipple eczema and other conditions. 1. Local airtightness: Since summer is hot, if you wear underwear that is too thick, or wear underwear for a long time, the breast area is not airtight, which may cause skin itching. 2. Allergy: If the patient is allergic to the material of the bra, such as the material of chemical fiber clothing, etc., it may irritate the breast skin, resulting in allergic itching of the breast, which may be accompanied by a small red rash. 3. Nipple eczema: If there is eczema in the nipple area, there will be obvious itching symptoms, and there are reddish papules or pimples at the base, at night and when the temperature rises, the itching feeling is more serious, and may be accompanied by vesiculation, bleeding, oozing, and flaking and other symptoms. In addition, some breast diseases such as nipple eczema-like breast cancer, mastitis and so on may also lead to similar symptoms, summer breast itching may also be other reasons, it is recommended that the patient consult a doctor in a timely manner, to do a systematic examination, to clarify the cause of the disease.