Ductal dilatation is a common benign breast disease in women. The typical clinical manifestations are breast swelling and pain, and grape-like hyperplasia nodules can be palpated in the breast. When the breast ducts are limitedly dilated and there is no clinical manifestation, no special treatment can be given, only regular review of the mammogram and dynamic observation of the degree of dilatation. If there is breast swelling and pain, hot towels can be applied and symptomatic treatment such as oral prolotherapy can be given. If the infection is acute and the breast is red, swollen, hot and painful, anti-infection treatment with penicillin or cephalosporin antibiotics can be given first, and if a breast abscess is formed, breast abscess incision and drainage is needed. If a long-lasting inflammatory sinus tract is formed, partial mastectomy is required. If cancer is suspected, a fine needle aspiration biopsy should be performed in a regular hospital to clarify the nature of the lesion, and if necessary, radical breast cancer surgery should be performed.