Nipple rupture occurs mostly in women during the postpartum period when they are breastfeeding and is mostly caused by the baby sucking hard. Nipple rupture is a problem that many new mothers are prone to. A ruptured nipple can make the nipple very painful, especially when breastfeeding the baby, which may be caused by incorrect feeding methods and incorrect breastfeeding posture of the baby, or by the epidermis of the nipple being too delicate and being bitten by the baby. Ruptured nipples can easily lead to acute mastitis if infected. Ruptured nipples are painful, bleeding or mucousy water from fissures in the nipple and areola area, mostly due to delicate nipple skin, mechanical stimulation or local uncleanliness. If you are careless, the rupture will be infected and inflamed, or even cause mastitis, do not use soap, alcohol and other stimulants to clean the nipple, which will cause the nipple too dry easily make the nipple rupture, and in serious cases the nipple will ulcerate and secondary infection.