Grade 3 breast nodules in menopause may be caused by dilated milk ducts, mastitis or fibrocystic breast disease. 1. Dilatation of breast ducts: common in postmenopausal women. The rubbery nodules around the areola are accompanied by temporary pain, itching, tenderness, redness of the skin around the areola, and multiple ductal spills, mucus or multicolored fluid. 2. Mastitis: Nodules feel hard, painful, fluctuating, skin dimpling, nipple displacement, constriction, compression, and rupture, accompanied by breast redness, swelling, heat pain, cellulite, fever, and trembling. 3. Breast fibrocystic disease: the most common breast nodule is breast fibrocystic disease, with smooth, round and elastic surface, pain before menstruation, which can occur bilaterally or in a wide range of sizes, thickening of the surrounding tissues on palpation, and the nodule can be moved. It can be distinguished from malignant nodules because it is not fixed and therefore is not causing nipple inversion. Grade 3 breast nodules can also be caused by other reasons, it is recommended to go to the hospital for timely examination and diagnosis, and under the guidance of the doctor for treatment.