How long does a fever last with a virus?
Most fevers caused by a virus last for 3 to 4 days, although some can last as little as 1 day, and others, such as one caused by Dengue fever, can last up to 10 days or more.
Viral fevers can range in temperature from 99°F (37.2°C) to over 103°F (39.4°C), depending on the underlying virus. Most people have a body temperature of about 98.6°F (37°C).
Anything higher than 100°F (37.8°C) is considered a mild fever and above 102.2°F (39°C) is considered a high fever.
In most cases, a viral fever isn’t anything to worry about. But if your fever reaches 102.2°F (39°C) or higher, it’s best to call a doctor. You should also call a doctor if you have a baby with a temperature above 100.4°F (38°C).
Most viral fevers will resolve by themselves within a few days, but while you have the fever get as much rest as possible and stay hydrated.
See a doctor urgently or go to an emergency department if you develop any of the following symptoms in conjunction with a fever, because these may indicate meningitis:
- severe headache
- stiff neck
- light hurts your eyes.
Also, contact your doctor immediately if you have a fever and you are:
- taking immune-suppressant medicines such as steroids, methotrexate, or cancer medication
- a transplant recipient
- HIV positive
- having trouble breathing
- getting confused or are unusually drowsy
- or have recently traveled overseas.
- Fever. Health Navigator NZ. https://www.healthnavigator.org.nz/health-a-z/f/fever-general/
- Stay Home When You Are Sick Centers for Disease Control and Prevention. https://www.cdc.gov/flu/business/stay-home-when-sick.htm
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