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The human body regulates its temperature. There are certain functions which provide the release of heat if there is a high body temperature and in case of a low temperature, the body is able to control the reduction to a certain extent. Body temperature fluctuates due to environmental conditions and this is considered normal however, abnormal fluctuation of the body temperature may point to the presence of some underlying conditions which need to be diagnosed and treated as soon as possible.

In hot conditions our body controls its temperature by increased sweating. Excess sweat evaporates and effects the cooling of the surface of the skin. On the other hand, in cold weather a body tries to maintain adequate body temperature by preserving heat. The blood is transferred from the small capillaries from the periphery of the body to inner warm parts and the brain sends massages to muscles to start shivering. Shivering may generate heat and maintain body temperature for a certain period of time.

Normal fluctuation of the body temperature is between 97.0oF to 100.00F. If fluctuation exceeds these limits, there is a reason for concern.

Causes of Fluctuating Body Temperature

Fluctuation of body temperature is associated with certain physiological processes and it may also be a symptom of certain illnesses.

For example, fluctuation of body temperature is typical for body growth. It increases within the first or second day after the birth and then it decreases slightly to the middle age. In elderly people body temperature again slightly increases.

Circadian rhythms are related to a change in body temperature in case of activity of the body and rest. The drop in body temperature in this case occurs between the 3 and 5 AM and 1 and 4 PM.

Temperature fluctuation is also connected to hormonal changes. This particularly occurs during menstruation and ovulation. Fluctuation may also affect pregnant women.

Abnormal fluctuation of body temperature is a typical feature of many infections and other diseases (injury, trauma, arthritis, brain tumors etc). Even intake of certain medications may cause body temperature fluctuations. And finally, fluctuation of body temperature occurs after meals and is always associated with consumption of alcohol and exercises.

Consequences of Fluctuating Body temperature

If the body temperature becomes too high the person may suffer from intensive headache, dizziness, confusion, cardio-respiratory collapse, seizures, shock and in some cases there is a change of severe damage to the brain.

On the other hand, excessive reduction in body temperature leads to reduced reflexes or complete loss of reflexes, shallow breathing, serious arrhythmias and respiratory arrest.

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