Fever in children

Fever is a common symptom of a variety of diseases in children. At the outset, it is very important to clearly understand that it is only a symptom and not a disease in its own right.

- BY DR B.J.C.PERERA

When the body temperature is elevated above the normal level of around 98.6 degrees Fahrenheit (F) or 37 degrees Celsius (C), the condition is referred to as fever. It is a significant accompanying symptom of a plethora of childhood diseases. All children would get a fever at some time or another in their lives, and in the vast majority of cases, this is due to rather mild illnesses, and they are completely back to normal within a few days. Some may have a rather low-grade fever, while others may have quite a high fever. However, in certain situations, fever may be an important indication of an underlying serious problem. The significance depends entirely on the circumstances under which this occurrence is seen.

Irrespective of the actual underlying reason for the fever, the basic mechanism of causation of fever is the temporary resetting of the temperature-regulating thermostat of the brain to a higher level. The consequences are that the heat generated within the body is not effectively dissipated. It is merely a body response to a harmful agent and is a very important defence mechanism. Turning up the core temperature is the body's way of fighting the germs that cause infections and making the body a less comfortable place for them. However, less commonly, it is also a manifestation of other inflammatory disorders in children. The significance of fever in such situations is a little bit different to that which is seen as a response to an infection.

The part of the human brain that controls body temperature is not fully developed in young children. This means that a child’s temperature may rise and fall very quickly and the child is also more sensitive to the temperature of his or her surroundings. Although parents often worry and get terribly scared with the child developing fever, it does not cause any harm by itself. It is a good thing in the sense that it is often the body’s way of fighting off infection.