A little pain in one breast and the discovery of a significant hard lump need to be combined with a color ultrasound examination of the breast, which is commonly caused by breast hyperplasia. Mammary gland hyperplasia occurs due to the abnormal expression of estrogen and progesterone in the body, and compensatory hyperplasia of the mammary glands occurs, especially if the history of the disease is long, and nodules of hyperplasia are also formed, so they will appear as hard lumps. The typical manifestation of mammary gland hyperplasia is pain, manifested as breast swelling and pain, and the pain also has a certain regularity, especially in the premenstrual period is more obvious, after the period can also gradually improve, reduce, disappear symptoms. Ultrasound examination can also show echogenic changes inside the breast gland, and the treatment of breast hyperplasia includes general treatment, medication, and regular life rules and regular color ultrasound examinations.