Has your high body temperature stayed at 39°C for days even after taking paracetamol? Your body feels hot and cold at the same time, weak, and even simple activities feel exhausting. It’s normal to feel worried—because high fever is not something to ignore.
Many people think all fevers are the same. In reality, a high body temperature can be a sign that your body is fighting a viral infection, bacterial infection, or another underlying health condition.
While most cases improve with home care, some conditions require immediate medical attention.
What Is Considered a High Fever?
Fever is a natural response of the body to infection or inflammation.
In general, a high fever is defined as a body temperature of 39°C or higher.
Simple breakdown:
- 37.5°C–38°C = mild fever
- 38.1°C–39°C = fever
- Above 39°C = high body temperature
- 40°C or higher = emergency condition
When this happens, the body is actively fighting infection or inflammation.
Common Causes of High Fever
High body temperature can be caused by several conditions, ranging from mild to serious.
1. Viral Infections
This is the most common cause.
Flu, COVID-19, and other viral infections often trigger high body temperature along with cough, sore throat, body aches, and fatigue.
2. Bacterial Infections
Bacterial infections can also cause high body temperature.
Examples include urinary tract infections, pneumonia, tonsillitis, and ear infections. Some cases require antibiotics prescribed by a doctor.
3. Dengue Fever (DHF) – Critical Phase Warning
In Indonesia, dengue fever is one of the most feared causes of high body temperature . Typically, fever reaches 39–40°C during the first 2–3 days, then starts to drop on day 4 or 5. However, this drop is actually the critical phase of dengue. The risk of shock and internal bleeding may increase during this period.
Symptoms include:
- Severe headache, especially behind the eyes
- Muscle and joint pain
- Nausea or vomiting
- Loss of appetite
- Red spots on the skin that do not fade when pressed
If high body temperature lasts more than 3 days with these symptoms, seek medical care immediately.
4. Other Medical Conditions or Medication Reactions
Some medications, vaccinations, or inflammatory diseases can also trigger temporary fever. If it persists, medical consultation is recommended.
Symptoms That Often Appear
Besides high body temperature, you may also experience:
- Chills
- Headache
- Weakness
- Muscle pain
- Loss of appetite
- Sweating
Daily activities usually become difficult during this time.
How to Reduce High Fever at Home
If there are no danger signs, these steps may help:
1. Drink Plenty of Water
High body temperature causes fluid loss through sweating. Staying hydrated is essential to prevent dehydration.
2. Get Enough Rest
Your body needs energy to fight infection, so avoid heavy activities.
3. Use a Warm Compress
Use a towel soaked in lukewarm water (not ice water). Place it on the forehead, armpits, or groin for 10–15 minutes.
4. Fever-Reducing Medication
Medications like paracetamol or ibuprofen can help reduce fever temporarily. However, if dengue is suspected, it is safer to use paracetamol and avoid ibuprofen due to bleeding risk. Always follow dosage instructions or doctor advice.
5. Wear Comfortable Clothing
Light and breathable clothing helps the body regulate temperature better.
High Fever: When to See a Doctor
Seek medical help immediately if:
- Temperature reaches 40°C or higher
- Fever lasts more than a few days
- Difficulty breathing
- Seizures
- Persistent vomiting
- Rash or spreading red spots
- Confusion or decreased consciousness
For Babies and Children
Go to the emergency room if:
- Babies under 3 months have a fever of 38°C or higher
- Seizures occur
- Refusal to drink or eat
- Signs of dehydration (dry lips, little urination)
Read Also : How to Treat Typhoid Fever: Symptoms You Shouldn’t Ignore
Conclusion
High fever is a sign that your body is fighting infection or inflammation. It can be caused by viruses, bacteria, or more serious conditions like dengue fever.
Most cases improve with rest, hydration, and proper care at home. However, if the high body temperature persists or worsens, medical attention is necessary.
Pay attention not just to the temperature, but also to accompanying symptoms—they often reveal the real cause.
This article is for informational purposes only and does not replace professional medical advice. Always consult a healthcare provider if symptoms become severe or persistent.