Breast pain and fever during breastfeeding may be acute mastitis caused by milk stagnation and bacterial invasion, which can be treated by physiotherapy, oral medication and surgery. 1. Physical therapy: this time you need to suspend breastfeeding, first use a hot towel to apply localized warm compresses, and then use a breast pump to suck the milk out of the breast, which can alleviate the symptoms of chest pain and fever to a certain extent. 2. Oral medication: If the pain is severe, you can go to the hospital to do routine blood tests, according to the inflammation of oral amoxicillin, cephradine and other antibiotics as prescribed by the doctor for treatment. If the temperature exceeds 38.5℃, you can take ibuprofen suspension, acetaminophen and other drugs to reduce fever. 3. Surgery: If the above treatments do not provide relief and an abscess has formed, the breast needs to be incised and drained. If the symptoms of breastfeeding chest pain and fever persist without relief, it is recommended that the patient go to the hospital in time, so as to avoid delaying the condition and causing adverse consequences.