There are three main possibilities for breast itching: first, physiological factors, due to the increase in estrogen during puberty, resulting in interstitial edema stimulating the breast skin causing itching discomfort, which may not be specially treated, and can be relieved after the first menstrual period. Secondly, breast eczema, an allergic non-infectious disease of the skin of the breast, which occurs in the skin around the nipple and areola, the acute onset can be seen in the breast skin erosion, intense itching, can be accompanied by pain and flaking. Thirdly, breast skin allergy, mostly related to the wearing of non-breathable chemical fiber underwear, manifested as breast itching and accompanied by allergic rash formation. There are various causes of itchy breasts in girls, and they should be seen by a regular hospital breast surgery or dermatology department in time to clarify the type and cause of itchiness and cooperate with specialist treatment, which can be cured.