How does the baby of 3 months have a fever 38 degrees do

For a 3-month-old with a fever of 38 degrees, ice the area where the aorta runs, such as the armpit, groin, or popliteal fossa, with a towel wrapped in ice. Fever patches, warm baths, or alcohol baths may also help cool the child. Avoid catching cold and ensure adequate rest during this time.