The average normal body temperature is 98.6 degrees.

Chills result from a fever spike -- when the temperature goes up suddenly and reverses just as quickly.

Tepid water is effective and less jolting than cold water.

Get medical help if an infant has a fever of 101 degrees or if fever in an older child doesn't subside after two days.

6 months, although it can happen from 6 months to 5 years. If a small child convulses during a fever, place the child on the floor on his or her side to prevent choking. Don't restrain the child, and be sure no objects are in the mouth. Call for medical help if the seizure hasn't stopped after 10 minutes.

All of the above.

Extreme exertion, such as running a marathon, can raise body temperature to as much as 107 degrees.

Also sponge with tepid water and give fluid if the person is alert.