Signs of a Fever: Key Clues to Look Out For


When you are not feeling well, one of the first things you may do is check your temperature. If you have a fever, it can be a sign that your body is fighting off an infection. But how do you know if you have a fever? In this article, we’ll go over the signs of a fever and what they mean.

What is a Fever?

A fever is a temporary increase in body temperature, usually due to an illness. The normal body temperature for an adult is around 98.6°F (37°C), but this can vary depending on the person. A fever is usually defined as a temperature of 100.4°F (38°C) or higher.

Signs of a Fever

There are several signs of a fever to look out for, including:

1. High Temperature

The most obvious sign of a fever is a high body temperature. As mentioned earlier, a fever is defined as a temperature of 100.4°F (38°C) or higher. However, it’s important to note that body temperature can fluctuate throughout the day, so a single reading may not be enough to determine if you have a fever.

2. Sweating and Chills

When you have a fever, you may experience sweating and chills. This is because your body is trying to regulate your temperature and bring it back down to normal.

3. Headache

Many people with fevers also experience headaches. This can be due to the body’s immune response to the infection.

4. Fatigue

When your body is fighting off an infection, it can take a lot of energy. As a result, you may feel fatigued and less energetic than usual.

5. Muscle Aches

Muscle aches are another common sign of a fever. Like headaches, this can be due to the body’s immune response to the infection.

6. Loss of Appetite

When you’re not feeling well, you may not have much of an appetite. This can be due to the body’s prioritization of fighting off the infection over digesting food.

7. Dehydration

Fever and sweating can lead to dehydration if you’re not drinking enough fluids. Make sure to drink plenty of water and other fluids to stay hydrated.

8. Skin Rashes

In some cases, a fever can cause a skin rash. This is more common in children than adults.

9. Irritability

Children with a fever may be more irritable than usual. This can be due to discomfort and the body’s immune response.

10. Stuffy or Runny Nose

If your fever is due to a respiratory infection, you may also have a stuffy or runny nose.


1. What causes a fever?

Fevers are usually caused by infections such as the flu, cold, or a urinary tract infection. They can also be caused by other medical conditions such as autoimmune disorders.

2. How long does a fever usually last?

The duration of a fever can vary depending on the cause. Fevers caused by a cold or flu typically last a few days to a week. Fevers caused by other infections or medical conditions may last longer.

3. When should I see a doctor if I have a fever?

If your fever is accompanied by severe headaches, chest pain, difficulty breathing, or other severe symptoms, you should seek medical attention. You should also see a doctor if your fever lasts for more than a few days or if you have a high fever (over 103°F/39.4°C) for more than a day or two.

4. How can I treat a fever?

The best way to treat a fever is to rest and drink plenty of fluids. Over-the-counter medications such as acetaminophen or ibuprofen can also help reduce fever and relieve other symptoms.

5. Can a fever be dangerous?

In most cases, fever is not dangerous and is simply a sign that your body is fighting off an infection. However, in rare cases, fever can lead to complications such as seizures. If you are unsure, it’s best to seek medical advice.


Having a fever can be uncomfortable, but it’s usually a sign that your body is working to fight off an infection. By knowing the signs of a fever, you can take steps to rest and treat your symptoms. Remember to stay hydrated and seek medical attention if your symptoms become severe or last for an extended period of time.

Rate article
( No ratings yet )