When your child is sick, everything else seems secondary. Abdominal pain with fever is one of the most common reasons for bringing a child to the doctor. Several conditions can cause these symptoms, some far more serious than others.

When an infant or young child exhibits a high temperature accompanied by chills and shivers, these symptoms could be related to a variety of different maladies.

If your child’s illness has passed and then a rash appears, this can be cause for concern among most parents. Roseola and fifth disease are common childhood illnesses that first cause a fever that’s followed by a rash. Always consult with your child’s doctor for a proper diagnosis and treatment.

Decreased appetite and fevers typically go hand-in-hand, and your goal during the course of your toddler's fever will be to get him to eat and drink as best as possible.

Allergies do not cause fevers, according to MayoClinic.com. Allergies can, however, give rise to other conditions that are sometimes accompanied by fever. Elevated body temperature can also be a symptom of illnesses similar to allergies.

When you exercise, your muscle cells need to rapidly mobilize large amounts of glucose to provide energy. Only a quarter of this energy is actually converted to motion, however; the remainder is lost as heat.

The elderly are at higher risk than the general population for temperature-related health issues. The body's reduced ability to regulate temperature, medical problems, medications and the environment are all factors affecting the ability of elderly individuals to maintain a healthy body temperature.

Many doctors consider an oral temperature above 99.5°F or a rectal temperature higher than 100.4°F a fever. If an infant younger than three months has a temperature higher than 100.4°F or if a baby between three and six months has a fever higher than 101°F, call your doctor.

Toddlers with a mild to moderate fever often experience sleep disturbances. Fevers can cause your child to have both nightmares and night terrors, but the latter are slightly more common in children around ages 4 or 5 years than in toddlers.

During exercise your body's system for regulating temperature is kicked up into high gear. Heat production by the body can cause your internal temperature to rise up to as high as 104 degrees Fahrenheit, which can lead to potentially fatal complications.

Watching your child deal with an illness is always difficult, but her fever breaking is often a sign she's on the way to recovery. As her temperature starts to go down, she should start to feel better, but she won't be completely healthy right away.

Fevers occur commonly during childhood. Most are due to the body’s defense against minor infections and resolve without consequence. However, fevers that reach high temperatures or last for more than three days are more likely due to a serious illness.