Itchy and painful breasts may be caused by allergy, breast hyperplasia or eczema-like breast cancer. 1. Allergy: It is possible that the breasts are allergic to the material of clothes, pollen or other substances causing a perverse reaction, which will make the breasts itchy and painful, and may be accompanied by redness, swelling and pimples and other symptoms. 2. Mammary hyperplasia: It is possible that breast itching and pain is caused by mammary hyperplasia, which is considered to be caused by changes in hormone levels in the body before or during menstruation. Of course, we can’t rule out the possibility that it is triggered by factors such as taking birth control pills. 3. Eczema-like breast cancer: it is a special type of breast cancer, which can be manifested as repeated eczema, flaking, redness and swelling in the nipple areola area, etc. It is necessary to go to regular hospitals for treatment in time. There are many reasons that can cause breast itching and pain, and it can also be caused by mastitis, etc. It is suggested that patients should go to breast surgery for relevant examination in time, and then deal with the cause of the disease in conjunction with the cause of the disease.