One month after bypass surgery or fever should go to the hospital to do a detailed examination in time, to clarify the cause of fever symptomatic treatment, simple fever can be through physical cooling or drug therapy, if the postoperative respiratory tract infection can be prescribed antibiotics such as amoxicillin. 1. Simple fever: physical cooling is mainly with alcohol or warm water rubbing palms, feet, neck and armpits, through the cooling effect of the skin, to relieve the patient’s fever symptoms, but also through the ice packs for cold compresses, rapid cooling; drugs have acetaminophen, ibuprofen, indomethacin, etc., to increase the body’s heat dissipation, reduce the temperature, relieve the fever. 2. Postoperative respiratory tract infection: antibiotics such as amoxicillin and clarithromycin can be taken as prescribed by the doctor. All of the above drugs should be used under the guidance of the doctor, not blindly use drugs on their own to avoid aggravation of the condition. One month after the bypass surgery, fever, fever-reducing treatment, and at the same time, pay attention to replenish the body’s water to prevent dehydration. If there is any discomfort, it is recommended to go to the hospital for treatment in time.