High fever
A fever is a rise in body temperature above the normal range (over 38°C). It is the body’s natural way of fighting off germs.
Possible causes
- Viral respiratory infections (e.g., flu, common cold)
- Bacterial infections (e.g., pneumonia, urinary tract infection)
- Other inflammatory diseases
Should I see a doctor?
In most cases, you can manage a fever at home with rest, plenty of fluids, and over-the-counter medicines. You should see a doctor if your general condition gets worse, the fever is very high (over 40°C), or it lasts for more than 4–5 days. You should also seek medical help if you have severe symptoms like difficulty breathing or intense head or stomach pain. For children, especially those under 3 months old, it is important to contact a doctor sooner.
Frequently Asked Questions
What is a fever and what is a low-grade fever?
A fever is a body temperature of 38.0°C or higher. A temperature between 37.5°C and 38.0°C is called a low-grade fever.
When is a fever dangerous?
A fever becomes dangerous if it is very high (over 40°C), lasts for several days, or is accompanied by a significant decline in your general condition, confusion, severe pain, or breathing difficulties.
How can I lower a fever at home?
You can lower a fever with over-the-counter medications like paracetamol or ibuprofen. It is also important to get enough rest and drink plenty of fluids to prevent dehydration.
Do I always need to see a doctor for a fever?
Not always. If your fever comes with a typical runny nose and cough and you feel generally okay, you can usually treat it at home. You should see a doctor if you don’t start to feel better or if you develop other worrying symptoms.
How long does a fever usually last?
A fever caused by a viral infection typically lasts for a few days. If the fever continues for more than 4–5 days, it is a good idea to see a doctor to find out the cause.
