Postpartum breastfeeding usually takes about 7 to 10 days for your breasts to stop hurting. Postpartum breastfeeding mainly refers to breastfeeding after delivery. Breast pain can be caused by breastfeeding in the wrong way, milk stagnation or mastitis. Mothers should take timely measures, such as changing the way of breastfeeding, letting the baby contain the whole nipple or most of the nipple, and using a breast pump to suck out the breast in time, so as not to cause milk stagnation, and generally about 7 days the breast will not hurt. If mastitis causes breast pain during breastfeeding, it’s best to find a professional breast opener to unclog the mammary glands, empty the breasts of the accumulated lotion, with massage, hot compresses, etc., to improve the symptoms of swelling and pain in the breasts. At the same time, it is also necessary to take antibiotics under the guidance of a professional doctor, such as penicillin, erythromycin, cephradine, cephalosporin and so on. After treatment, it will not hurt for about 7 to 10 days. If breast pain is caused by postpartum breastfeeding, it is recommended to go to a regular hospital for consultation and treatment as soon as possible to avoid aggravation of the condition.