When your body temperature rises above its normal range, you have a fever. A fever is typically a sign of an underlying medical condition, such as an infection, autoimmune disorder, or even cancer.

While a fever can be concerning, it’s important to understand that a fever actually serves an important purpose in the body’s immune response.

What Causes a Fever?

A fever is a common symptom of many different types of infections, such as bacterial, viral, and fungal. When an infectious agent enters the body, it triggers the immune system to produce certain chemicals, such as cytokines, to fight off the infection.

These chemicals can cause the body’s temperature to rise, leading to a fever.

In addition to infections, there are many other causes of a fever, such as autoimmune disorders, medications, and even some types of cancer.

It’s important to see a healthcare provider if you have a persistent fever that lasts more than a few days or is accompanied by other symptoms.

What Are the Symptoms of a Fever?

In addition to an elevated body temperature, a fever can cause other symptoms, such as:.

Chills or sweats
Headache
Fatigue
Muscle aches
Weakness
Loss of appetite

What Is the Purpose of a Fever?

While a fever can be uncomfortable, it actually serves an important purpose in the body’s immune response. A fever helps the body fight off infections by:.

Activating the immune system: A fever triggers the body’s immune system to produce more white blood cells and antibodies, which help fight off infections.
Slowing down the growth of certain bacteria and viruses: Some bacteria and viruses thrive at lower temperatures, so a fever can help slow down their growth and make it harder for them to reproduce.
Enhancing the body’s ability to repair tissue: A fever can stimulate the body’s cells to repair damaged tissue more quickly.

When Should You Worry About a Fever?

While a fever can be a sign of an underlying condition, it’s important to understand that not all fevers are cause for alarm. In general, adults should seek medical attention if their fever is:.

Higher than 103°F (39.4°C)
Lasting more than three days
Accompanied by other symptoms, such as severe headache, chest pain, difficulty breathing, or abdominal pain

However, it’s important to seek medical attention right away if you have a fever along with:.

Severe headache or confusion
Stiff neck
Difficulty breathing
Chest or abdominal pain
Severe vomiting or diarrhea
Seizures

How Is a Fever Treated?

The treatment for a fever depends on the underlying cause and the severity of the fever. In some cases, a fever may not require treatment at all, and just rest and fluids may be enough to help you feel better.

In other cases, your healthcare provider may recommend over-the-counter medications such as ibuprofen or acetaminophen to help reduce your fever and relieve other symptoms.

If your fever is caused by an infection, your healthcare provider may prescribe antibiotics or antiviral medications to help treat the underlying illness.

It’s important to take any medications as directed and finish the full course of treatment, even if you start feeling better.

Conclusion

A fever is a common symptom of many different types of medical conditions. While a fever can be concerning, it’s important to understand that it actually serves an important purpose in the body’s immune response.

If you have a fever, it’s important to monitor your symptoms and seek medical attention if necessary.