Infectious Disease
Fever
About Fever
Fever, also known as pyrexia, is a temporary increase in average body temperature, typically above 100.4°F (38°C). It is often a sign that the body's immune system is responding to an infection or illness.
Common Symptoms
- Sweating
- Chills and shivering
- Headache
- Muscle aches
- Loss of appetite
- Irritability
- Dehydration
- General weakness
Diagnosis
Fever is typically diagnosed by measuring body temperature using a thermometer. The location of the measurement (oral, rectal, axillary, temporal) can influence the reading. A healthcare provider may also inquire about other symptoms and conduct a physical examination to identify the underlying cause.
Causes
Fever is most commonly caused by infections, such as viruses or bacteria. Other potential causes may include inflammatory conditions, certain medications, specific vaccinations, or, less commonly, malignancies. The body's immune response to these factors can trigger a rise in temperature.
Treatment Overview
Managing fever often involves addressing the underlying cause. Over-the-counter medications like acetaminophen or ibuprofen are commonly used to reduce discomfort and lower temperature. Supportive care, such as resting and staying hydrated, is also frequently advised. Some individuals may explore complementary approaches like cool compresses or herbal teas, though their efficacy in treating fever itself is not broadly established.
Prognosis & Outlook
The prognosis for fever is generally good, as it is often a self-limiting response to common infections. Most fevers resolve within a few days once the underlying cause is addressed or runs its course. However, the outlook can vary significantly depending on the specific cause and the individual's overall health status.
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