What temperature is considered a fever in adults?

Fever in Adults: What Temperature Is Considered High?

A fever is defined as an increase in body temperature above the normal range. Although normal body temperature can vary slightly from person to person, it is typically around 37°C (98.6°F) [2]. Generally, an adult is considered to have a fever when their body temperature exceeds this normal range [2].

Why does a fever occur?

A fever is not a disease in itself; rather, it is often a sign that the body is attempting to fight off an illness or infection [2]. Most fevers are caused by infections, as the body raises its temperature to make conditions unfavorable for the viruses and bacteria causing the infection [2]. Fever also activates the body's immune system [2].

Other causes of fever

In addition to infections, there are other causes that can lead to an elevated body temperature, including:

Certain medications, such as some antibiotics, blood pressure medications, and seizure medications [2].
Heat exhaustion [2].
Certain types of cancer [2].
Autoimmune diseases [2].
Some childhood vaccines (though this is less common in adults) [2].

There are also rare conditions, such as Cryopyrin-Associated Periodic Syndromes (CAPS), which are a group of genetic conditions that cause recurrent episodes of rash, fever, and joint pain. These episodes may begin in childhood and persist for life [1].

When should a fever warrant a doctor's visit?

In most cases, a fever is a normal, temporary response and can be managed at home. However, there are warning signs that require an immediate doctor's visit. Medical attention should be sought if the fever is very high or if it is accompanied by other concerning symptoms. It is important to monitor symptoms associated with a fever, such as a severe headache, stiff neck, confusion, unexplained rash, difficulty breathing, or severe pain in any part of the body. These symptoms may indicate a more serious health problem that requires urgent medical evaluation. For more detailed information on when a fever indicates a serious problem and how to manage it, you can visit Fever in adults: When does it indicate a serious problem and how do you handle it? (Arabic).

How to manage a fever at home

If the fever is not very high and there are no warning signs, some measures can be taken to alleviate symptoms at home:

Drink plenty of fluids: This helps prevent dehydration, which is very important when having a fever [2].
Take over-the-counter medications: Medications such as acetaminophen or ibuprofen can be used to reduce a fever [2]. Only adults should take aspirin, whereas children with a fever must avoid it [2]. Always follow the dosage instructions on the package or as directed by a doctor.
Rest: Getting enough rest helps the body recover.
Wear lightweight clothing: This helps regulate body temperature.

It is important to remember that these measures are intended to relieve symptoms and are not a treatment for the underlying cause of the fever. If the fever persists, worsens, or any concerning symptoms appear, you should consult a healthcare provider.