Fever is one of the most common symptoms encountered in medical practice and clinical practice; this means an increase in body temperature above normal levels. The central body temperature or core temperature in humans remains almost constant with small variations despite temperature changes in the environment, to ensure stability (homeostasis) and the smooth functioning of cells and tissues. The heat in the body is a result of all metabolic processes performed in the tissues.
In most cases, a finding suggests the existence of fever and inflammation particularly underlying infectious disease. The underlying infection usually affects a specific area of the body, such as upper respiratory tract (common cold), throat and tonsils (pharyngotonsillitis), the lungs (pneumonia), brain (meningoencephalitis), heart (pericarditis, endocarditis), liver (hepatitis), gut (gastroenteritis), skin, etc. In these cases, the clinical picture of the patient is enriched with specific symptoms such as runny nose in colds and joint pains.
The symptoms may also include muscle aches, flu, sore throat and difficulty swallowing in tonsillitis, cough and dyspnoea in pneumonia, nausea and vomiting in gastroenteritis, and so on. In addition, many times, a way to display the fever may indicate the reasons for it. For example, the periodic appearance of fever in certain intervals may indicate malaria or other diseases. Finally, hyperpyrexia, fever exceeding 41.5 degrees C and is usually due to a very serious infection.
Can we have a body temperature increased without a fever? The hyperthermia is another situation in which again the body temperature is elevated relative to normal levels, but not as a result of normal elevation of the hypothalamic thermostat, as with the fever. In the case of hyperthermia, the warming due to inability of the body to expel excess heat, such as to heat stroke in heavy hyperthyroidism and after taking certain drugs (inhibition sweating).
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