Feeling pain after wearing a bra every day for a day, it is likely that the bra is too tight, strangling the breasts too tightly. It is recommended to wear suitable underwear, preferably without steel rings, and sports underwear is better for the breasts. It is also possible that there is breast hyperplasia, which is a cyclical enlargement and rejuvenation of the breast gland under the influence of estrogen. If the hyperplasia is excessive and the rejuvenation is incomplete, mastopexy will occur. Mastocytosis manifests itself as a swelling and pain that is more sensitive a week before the menstrual period, and often this swelling and pain disappears after the period. Therefore, it is also possible that this condition exists. If this is the case, it is recommended to go to a specialized breast surgery department in a regular hospital and have a breast ultrasound examination for a comprehensive assessment by a breast surgeon. If the menstrual cycle pain is longer than two weeks, it is recommended to take Chinese herbal medicines to eliminate the swelling, such as Xia Gu Cao, Dan Lu capsule, breast fetish elimination, etc.