Mastitis is a common disease in breastfeeding mothers. Mastitis can be triggered by nipple fissures and milk stagnation. Acute mastitis is mostly caused by Glucosococcus aureus and Streptococcus hemolyticus infections, and is characterized by redness, swelling, pain, localized lumps, and abscess formation. When acute mastitis occurs, breastfeeding may not be stopped, but when the breast becomes localized, breastfeeding should be stopped on the affected breast. The treatment of early mastitis is focused on lactation, and it is important to seize the opportunity to avoid aggravation of the condition. Let your baby eat more when there is milk accumulation in the breast, or use a breast pump to suck it out. If mastitis is not detected and treated in time, it can also easily lead to breast cancer, so special attention must be paid to it. When there is bloody plasma blood in the nipple, further examination must be paid attention to it, and the local skin of the breast shows orange peel or even edema discoloration, you also need to be alert to breast cancer. Then there is the lump. In the early stage, a lump the size of a bean can be touched in the breast and it is hard and can be pushed. If these symptoms occur, you need to go to the hospital for breast examination to determine the cause of the disease and get early treatment so as not to delay the disease. Be sure to pay attention to rest, eat more fruits and vegetables to replenish vitamins, and eat more meat and animal liver to replenish iron.