Sometimes there is a pain in the breast, usually considered to be a lesion caused by mammary gland hyperplasia. It is related to the hormone level in the body. Before the menstruation, the hormone level in the body increases and the breast will become painful, and after the menstruation, the breast pain may improve on its own. You can have a breast ultrasound examination for further clarification, and after that you need to take oral Chinese medicine for treatment, such as Breast Disease Spirit or Easy Pill. There may also be a mass inside the breast, which may be benign or malignant. Ultrasound and mammogram are needed to determine the benignity and malignancy of the masses before deciding on the next treatment plan.