Babies will feel weak when they have fever, they will show drowsiness, they need to be treated with antipyretic treatment first, and actively treat the cause of fever. 1. Anti-fever treatment: If the body temperature is less than 38.5 degrees, you can let the baby drink more water, rest, follow up and observe, and take physical cooling if necessary. If the temperature is greater than 38.5 degrees, go to the hospital in time, under the guidance of the doctor antipyretic medication. 2. Treat the cause of the disease: Acute upper respiratory tract infection, which is a common cause of fever, according to the pathogen of infection drug treatment. If you consider colds, self-limiting, influenza virus, can be oral oseltamivir granules. For bacterial infections, drugs such as cefixime can be applied. Mycoplasma infection, oral azithromycin, erythromycin and so on. Acute gastroenteritis, pay attention to rehydration, fluid and easy to digest diet, oral bifidobacteria and other probiotics treatment. When the baby has fever and drowsiness, you should bring the baby to the hospital in time to find out the cause of the disease and timely treatment. The above drugs need to be used under the guidance of a physician.