Fever and weakness, do not want to eat, may be intestinal infection, upper respiratory tract infection, can be given to reduce fever, rehydration, as well as to address the cause of the treatment. 1. Symptomatic treatment (1) Anti-fever: If the body temperature is over 38.5 degrees, give ibuprofen and aminophenol acetate to reduce the fever; if the body temperature is below 38.5 degrees, use warm water to wipe the body, ice cold compresses, and drink plenty of lukewarm water to reduce the physical fever. (2) Fluid replenishment: drink more water, replenish glucose and electrolytes if necessary to correct electrolyte disorders. 2. Treatment of causes (1) Intestinal infection: acute enteritis caused by bacterial infection of the intestine, antibiotics, montelukast, bifidobacteria and other drugs can be given. (2) Upper respiratory tract infection: If bacterial infection, antibiotics, such as cefaclor, amoxicillin and other anti-infective treatment can be applied as appropriate. Fever is weak, do not want to eat, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions for treatment, do not take medication on their own.