Dilatation of breast ducts on both sides is considered to be caused by cystic hyperplasia of the breast. The main manifestations of breast hyperplasia are hyperplasia of breast lobular tissue and dilatation of breast ducts. Breast tissues and ducts are regulated by hormone levels in the body, and there is regular proliferation and reappearance. When the hormone level in the body is disordered and imbalanced, the breast tissue will have excessive hyperplasia and under-regeneration, the breast ducts will be over-dilated, and the patient will have the symptoms of breast swelling, tingling, and breast lumps. After menstruation, the hormone level will decrease, and the hyperplasia will return to normal, and the dilatation of the breast ducts will disappear. The dilatation of breast ducts does not need to worry too much, considering that it is caused by normal physiological reasons for dilatation, you can ultrasound follow-up observation, if there is no obvious discomfort symptoms, do not need treatment, oral lactic fungus elimination, free pills and other medications for symptomatic treatment.