Breasts hurt when touched may be distended milk, acute mastitis or cystic hyperplasia of the mammary glands, which can be treated by using a breast pump and taking antibiotics or anti-estrogen drugs. 1. Swelling: If you are a breastfeeding woman, you may have a swollen breast, which may be caused by blocked milk ducts or excessive milk in the breast. You can use a breast pump to suck out the excessive milk or massage the milk ducts to make them loose again. 2. Acute mastitis: If the milk is stagnant for a long time, it may lead to acute mastitis, which is characterized by redness, swelling and hot pain in the breasts, and needs to be treated with antibiotics, such as amoxicillin and ceftazidime, etc. If there is a mammary abscess, it will need to be surgically incised to drain the abscess. 3. Cystic hyperplasia of the breast: it is a common disease that causes breast pain or tenderness in non-lactating women. The pain mostly occurs with menstruation, and it can subside by itself without treatment; if the symptoms are more serious, it can be treated with anti-estrogenic drugs, such as tamoxifen, and so on. In addition, breast trauma, nipple eczema, breast cancer and other diseases may also appear similar symptoms, we should consult a doctor in a timely manner to clarify the cause of the disease, under the guidance of the doctor for targeted treatment.