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Why You Might Feel Hot but Have No Fever

Feel Hot but Have No Fever

Have you ever felt really hot but had no fever? If so, you’re not alone. Many people experience this feeling from time to time, and there are a few different reasons why it might happen. Let’s take a closer look at a few of the most common causes.

1. Your body is fighting off an infection.

Even if your body isn’t able to mount a full-fledged immune response with a fever, that doesn’t mean it isn’t working hard to fight off an infection. When your body is fighting an infection, you might feel hot as a result of all the extra activity going on inside of you.

2. You’re dehydrated.

Dehydration can cause all sorts of problems, including making you feel hot when you don’t have a fever. Be sure to drink plenty of fluids throughout the day, especially if you’re sweating a lot or if it’s particularly humid outside. Drinking fruit juice or sports drinks can also help replenish electrolytes that you might be losing through sweat.

3. You’re experiencing hormonal changes.

Hormonal changes during puberty, pregnancy, and menopause can all cause Hot flashes (sudden feelings of warmth that are often accompanied by sweating and a rapid heartbeat). If you’re going through any of these life changes and are experiencing hot flashes, there’s no need to worry—they’re perfectly normal and will eventually subside. In the meantime, try to stay cool by dressing in loose-fitting clothing and drinking lots of fluids.

4. You have an overactive thyroid gland.

An overactive thyroid gland (hyperthyroidism) can cause a variety of symptoms in addition to feeling hot when you don’t have a fever, including weight loss, anxiety, and difficulty sleeping. If you think you might have hyperthyroidism, be sure to see your doctor so they can run some tests and confirm the diagnosis. Treatment for hyperthyroidism usually involves taking medication to bring the thyroid gland back into balance.


If you’ve ever felt hot but had no fever, there could be a few different reasons why. It could be that your body is fighting off an infection, that you’re dehydrated, or experiencing hormonal changes due to puberty, pregnancy, or menopause. In rare cases, it could also be due to an overactive thyroid gland. If you’re concerned about any symptoms you’re experiencing, be sure to see your doctor for an evaluation.