The breastfeeding women due to production body weakness, low immunity, infection caused by inflammation of the breast; or poor milk ducts, milk stagnation; nipple dysplasia, causing acute mastitis; also the baby containing the nipple and sleep or baby suffering from stomatitis bacteria directly invade the milk ducts cause inflammation. So it is important to take proper scientific care of your breasts to prevent mastitis from occurring. It is recommended that you start with the following points: a, late pregnancy daily with warm water or soapy water scrub nipples, so that nipples remain clean and nipple epithelial keratinization thickened, to avoid postpartum infant sucking and nipple cracking. Second, the nipple is broken or cracked, should suspend breastfeeding, sucking out the milk with a breast pump, to wait for the wound to heal before breastfeeding. If the nipples are indented, the nipples should be gently squeezed out and cleaned, and 3% boric acid water can be used to wash the nipples before and after breastfeeding. If there is still milk accumulation, the milk should be emptied as much as possible. If you find that the milk is stagnant, use a towel to apply hot compresses, and then massage the milk by rubbing it to eliminate the stagnant lumps. Keep the baby’s oral hygiene, timely treatment of stomatitis, do not let the baby sleep with the nipple. The breastfeeding mother should be relaxed and avoid excessive emotions. Pay attention to dietary regimen, preferably eat light and nutritious food, eat more fresh vegetables and fruits, avoid eating spicy and stimulating meat and greasy products.