What Happens When a Fever Breaks

A fever is a body temperature that is higher than normal. When a fever breaks, it means that the body temperature has returned to normal. This can happen suddenly or gradually.

How a Fever Breaks

When a fever breaks, the body’s hypothalamus, which is responsible for regulating body temperature, sends a signal to the blood vessels in the skin to dilate. This allows more heat to escape from the body, which helps to lower the body temperature.

The body may also sweat when a fever breaks. Sweating is another way that the body can cool down. As the sweat evaporates from the skin, it takes heat away from the body.

What to Expect When a Fever Breaks

When a fever breaks, you may experience some of the following symptoms:

Chills
Sweating
Headache
Muscle aches
Fatigue

These symptoms are usually mild and will go away within a few hours.

When to Call a Doctor

If you have a fever that is higher than 103 degrees Fahrenheit, or if you have other symptoms such as confusion, stiff neck, or rash, you should call a doctor.