Chills in babies with fever are commonly caused by elevated body heat, which can lead to spasms and contractions of the skeletal muscles and chills, as well as febrile convulsions. At this time, monitor your baby’s temperature closely, and treat your baby with antipyretics, such as ibuprofen or acetaminophen. This can be given orally or by anal suppository. Drink plenty of warm water and urinate and sweat to lower the body temperature. Fever is often caused by pathogens in the body, and blood tests should be performed to determine the cause of the illness and to provide antipathogenic treatment.