There are many reasons for breast swelling and pain in the first half of the menstrual period. 1. The first half of the menstrual period may be during ovulation. This is because of the high level of estrogen, which stimulates the expansion of blood vessels in the breasts, causing breast edema and pain when touched. 2. Changes in lifestyle habits, such as staying up late, mental stress, and a diet of spicy and stimulating foods, may cause breast pain in the half of the month before menstruation. 3. Oral medications, such as drugs that regulate the menstrual cycle, such as Ursine or Ursine, which can have certain adverse effects. The company’s main goal is to provide a solution to the problem of breast pain, which can be caused by the endocrine hormones that cause breast enlargement. If you’re not sure what to do, you should go to the hospital and get a breast ultrasound to rule out the possibility of breast nodules and mastitis.