1, the causes of breast pain 1, the general pain of mastocytosis is cyclical breast pain, it is related to the body estrogen and progesterone levels are cyclical changes. 2, rare non-cyclical breast pain, and not related to the menstrual cycle, it often occurs in a specific location, mostly related to trauma or costochondritis. 3.Oral contraceptive pills 4.Hormone application 5.Wearing ill-fitting bra 2.How to treat 1.Heavy on self-regulation, including: reduce tension and anxiety, wear a suitable bra, reduce the intake of stimulating food (such as coffee, tea, drinks, chocolate), low salt and low fat diet, eat more fruits, vegetables and grains, maintain weight to prevent obesity, take multivitamins, etc. 2.Visit the hospital, under the guidance of the doctor medication.