Is it normal to sweat when sick?

Why This Happens

When your body detects a pathogen, such as a virus or bacteria, it may increase its core temperature to create an environment that is less hospitable to the germ. This is known as a fever. Once the body decides it is time to return to its normal temperature, it employs cooling methods.

• The Fever “Break”: As a fever resolves, the brain signals the sweat glands to release moisture. The evaporation of this sweat from the skin surface helps lower the body’s core temperature quickly.
• Immune Response: The metabolic process of fighting an infection can generate internal heat, which the body manages through perspiration.
• Medication Effects: Certain over-the-counter fever-reducers can trigger sweating as they artificially lower the body’s temperature set-point.

What It Might Mean in Your Situation

The meaning of sweating while sick often depends on the timing and the accompanying symptoms. If you have been feeling chilled or shivering (the “chills”) and suddenly begin to sweat, it often indicates that your temperature is dropping. This is a common transition during the recovery phase of a cold or flu.

Context matters: are you sweating only at night (night sweats), or is it a constant state? Consistent, heavy sweating without a clear fever may be different from the sporadic sweating associated with a common cold. Additionally, consider your environment; heavy blankets and pajamas can trap heat, making you sweat more than you would in lighter clothing, which is a matter of external regulation rather than just the illness itself.

What To Do About It

1. Manage Hydration: Because sweating removes fluids and electrolytes from your body, it is practical to increase your intake of water, broth, or oral rehydration solutions to prevent dehydration.
2. Adjust Your Layering: Instead of using one heavy duvet, try layering thin blankets. This allows you to easily remove a layer when you begin to sweat and add one back if you start to feel the chills again.
3. Prioritize Hygiene and Comfort: Change into fresh, breathable cotton clothing once your pajamas or sheets become damp. This prevents the skin from becoming irritated and stops you from feeling chilled by wet fabric.

Real-Life Example

Sarah wakes up with a sore throat and a high fever. For the first two days, she feels freezing and wraps herself in three blankets. On the third morning, she wakes up drenched in sweat and feeling significantly warmer. Recognizing this as a “fever break,” she takes a lukewarm shower, puts on a fresh cotton t-shirt, and drinks a large glass of water. By managing the moisture and staying hydrated, she allows her body to cool down naturally and comfortably.

Related Questions

• Why do I get the chills when I have a fever?
• How can I tell if a fever is breaking?
• What is the best way to hydrate during the flu?
• What is the difference between night sweats and fever sweats?

When To Seek Outside Help

While sweating during a common illness is usually normal, you should contact a healthcare professional if the sweating is accompanied by severe symptoms. Seek medical attention if you experience difficulty breathing, chest pain, a fever that will not come down with medication, or if you exhibit signs of severe dehydration (such as extreme dizziness or a lack of urination). If you experience chronic night sweats that persist long after you have recovered from a cold, a licensed medical provider can help determine the underlying cause.