Cold fever after bathing may be due to viral or bacterial infection, etc. Symptomatic treatment (physical cooling, medication to reduce fever) and symptomatic treatment (antiviral and antibacterial drugs) should be given according to the cause. 1. Symptomatic treatment (1) Physical cooling: If the body temperature is below 38.5 degrees, you can drink more water to replenish water, use cold towels to repeatedly apply to the forehead or use warm water to wipe the armpits, groin, chest, back and other parts of the body, to promote the body temperature to fall through the evaporation of water to dissipate heat. (2) Drugs to reduce fever: If the body temperature exceeds 38.5 degrees, you can take acetaminophen, ibuprofen, etc. to reduce fever. 2. Treatment of the cause (1) Antiviral drugs: If the infection is caused by adenovirus, parainfluenza virus, etc., you can take ribavirin and other antiviral treatment if necessary. (2) Antibiotics: For bacterial infections, antibacterial drugs such as cefaclor and cefdinir can be given to fight infection. The use of drugs must follow the doctor’s instructions, not blindly use their own drugs, so as not to cause adverse consequences.