Symptoms that may occur as a result of breast lesions include the following: 1. Pain, which may be swelling, tingling, etc., is usually the most common clinical symptom caused by hormonal secretion level stimulation of the breasts, and the usual disease is breast hyperplasia. Another aspect of pain caused is due to inflammation of the breast, including lactational mastitis or non-lactational mastitis. The patient’s pain is often accompanied by a fever and breast space-occupying lesions, including benign space-occupying or breast cancer, which may cause pain. 2, the common symptom is nipple discharge, usually caused by breast lesions invading the ducts of the mammary glands, resulting in hemorrhaging. The color of the overflow may be clear, yellow or bloody or purulent, depending on the specific disease of the patient.3. Rarely, it is nipple inversion caused by breast-occupying lesions, and the size imbalance of bilateral breasts.