Fever: Causes, Symptoms, Temperature Levels, and Treatment
A fever occurs when body temperature rises above the normal range. The average normal body temperature is around 37°C (98.6°F), although it may vary slightly depending on the time of day and how it is measured.
Fever is usually a natural response of the immune system as the body fights infections such as colds, flu, or other viral or bacterial illnesses.
Fever Temperature Chart in Adults
Fevers can be classified based on body temperature:
Low-grade fever
37°C – 38°C (98.6°F – 100.4°F)
Moderate fever
38°C – 39°C (100.4°F – 102.2°F)
High fever
Above 39°C (102.2°F)
A temperature of 40°C (104°F) or higher is considered a medical emergency and requires immediate medical attention.
Common Fever Symptoms
Fever often appears with other symptoms while the body fights infection, including:
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Sweating
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Chills
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Headache
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Muscle pain
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Weakness
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Loss of appetite
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Restlessness or difficulty sleeping
What Causes Fever?
Fever is typically caused by viral or bacterial infections. When the body detects harmful pathogens, it raises its temperature to help eliminate bacteria and viruses that are sensitive to heat.
Common conditions associated with fever include:
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The common cold
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Influenza (flu)
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Viral infections
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Certain bacterial infections
In many cases, fever resolves on its own within a few days.
How to Treat a Fever at Home
Most fevers are mild and can be treated with simple home care:
Stay hydrated
Drink plenty of fluids to prevent dehydration and help regulate body temperature.
Get enough rest
Rest helps your immune system fight infection more effectively.
Eat light foods
Choose foods that are easy to digest, such as soup or crackers.
Use warm compresses
Applying a damp cloth to the forehead may help reduce discomfort.
Take fever-reducing medication
Medicines containing paracetamol (acetaminophen) like NOTTS® Extra Strength may help reduce fever and relieve headaches and body aches.