Four breasts can be the result of a congenital breast deformity, usually with the presence of a secondary breast. Four breasts are multiple breasts in the context of breast malformations, which means that there are two secondary breasts in addition to the two normal breasts. The secondary breasts are usually born and appear outside the breast area. The secondary breasts usually appear as a mass of breast tissue on the anterior axillary line, and even nipple marks or small nipples are visible, and are accompanied by premenstrual swelling and pain, and in a few cases there is a possibility of cancerous changes. In general, there is no obvious effect of paratesticular breasts, if the volume is small and asymptomatic, usually can not be special treatment; if paratesticular breasts have many symptoms, premenstrual pain, large size affects the appearance, etc., it is recommended that the patient undergo surgical excision. If you find that there is a paratesticular breast in addition to the normal breast, it is recommended that you consult a regular hospital and under the guidance of a doctor for regular treatment.