My Symptoms

Fever: the causes

Fever can be a symptom of many diseases and therefore have very different causes.

Notably an infectious disease caused by a bacterium, a virus and a fungus ... sometimes causes fever. For example :

  • cold,
  • influenza,
  • pneumonia,
  • angina,
  • cystitis,
  • appendicitis,
  • mononucleosis, etc.

A high fever can also indicate sepsis (a significant increase of bacteria in the blood). Similarly, in various diseases of the traveler, a fever can occur: dengue fever, Nile fever, malaria ...

Fever is also a symptom appearing in various common childhood diseases, for example:

  • measles,
  • mumps,
  • rubella,
  • varicella,
  • scarlet fever...

Fever is also common in autoimmune diseases (such as sarcoidosis or inflammatory rheumatic diseases at a certain stage of development) and diseases that weaken the immune system (eg, AIDS).

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Variations in hormonal values ​​can also cause fever. For example, in case of hyperthyroidism or during hormonal premenstrual variations. In women, body temperature generally increases by about 0.5 ° C after ovulation.

Another cause is that a fever has nothing to do with an infectious problem, but with a metabolic problem, such as hypernatremia (intracellular dehydration).

Fever is also a symptom that can occur in patients with certain cancers (eg, leukemia or lymphoma).

Fever can also result from a disorder of the thermoregulatory center in the brain, or be the result also of hyperthermia due to very high external temperatures (heat stroke and sunstroke).

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Read also :

> Infantile diseases
> Yellow fever (jaundice)

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