Methods for reducing swelling in acute mastitis: First, determine whether the acute mastitis is caused by milk stasis or by bacterial invasion and decreased immune resistance. If it is simply due to milk stasis, nursing can still be continued if the symptoms are mild and the lesion is not severe. However, the affected breast should not be used for nursing, and a breast pump can be used to extract the milk. If the condition is caused by bacteria, it is recommended to apply local moist heat. Penicillin and other saline can be injected around the inflammation. Systemic antibiotics, such as penicillin or cephalosporins, can be used. However, since antibiotics can be secreted into the milk and affect the infant, the use of tetracyclines, aminoglycosides, and sulfa drugs should be avoided.