Hi, there are various causes for fever.  fever is a temporary increase in your body temperature, often due to an illness. Having a fever is a sign that something out of the ordinary is going on in your body. Drink plenty of fluids. Fever can cause fluid loss and dehydration, so drink water, juices or broth. For a child under age 1, use an oral rehydration solution such as Pedialyte. These solutions contain water and salts proportioned to replenish fluids and electrolytes. Pedialyte ice pops also are available.Rest. You need rest to recover, and activity can raise your body temperature.Stay cool. Dress in light clothing, keep the room temperature cool and sleep with only a sheet or light blanket. Consult Physician...