Breast pain or breast pain is a very common symptom of the breast, which may be caused by the influence of estrogen and progesterone from the ovaries, causing congestion, edema and structural changes in the breast gland. From a macroscopic point of view, it is the thickening and hardening of the mammary glands, and there are many sensory nerve endings penetrating in the mammary glands. These sensory nerves will be compressed and pulled, and sensitive people will feel pain, which is usually a visceral pain characterized by swelling, hidden pain, stabbing pain, radiating pain and so on. At the beginning, this pain is regular, usually before the menstruation will be aggravated, and after the menstruation will gradually reduce or even disappear, but with the change of the glandular structure of the breast, the pain will become irregular after the hyperplasia is very serious, and the pain time will be prolonged.