7 things that can cause night sweats in women

A woman wakes up sweating
A woman wakes up sweating

Picture it: You climb into your cozy bed, snuggle up under the duvet, and drift off to sleep…only to wake up a few hours later totally drenched in sweat.

Miserable? Yes. Also kind of scary? Yes to that, too.

Most of the time, your night sweats could be caused by something totally harmless—like the temperature of your bedroom or the fabric of your PJs.

But sometimes, your sweaty nights might be a sign of an underlying condition you need to get checked out ASAP, says Dr. Neomi Shah, associate professor, pulmonary and sleep medicine, at the Icahn School of Medicine at Mount Sinai.

A general rule? If your night sweats persists for more than two or three months, get yourself checked out, says Shah—but instead of jumping to the worst-case scenario, take a peek at what commonly causes night sweats in women, and what you can do about it.

1. Your room is just too hot

What’s the temperature of your bedroom right now? If it’s anything other than 15 to 20 degrees Celsius, it’s probably too hot, says Dr. W. Christopher Winter, sleep specialist and author of The Sleep Solution: Why Your Sleep Is Broken and How To Fix It.

Less-breathable fabrics (like your flannel PJs) can also contribute to your sweaty sleep woes, which makes breathable cotton a better option for both your PJs and sheets.

Feeling hot can also impede your ability to actually fall asleep—in the process of drifting off, your body temperature should drop one to two degrees below normal, and it can’t do that in a warm room.

READ MORE: Why do some people sweat way more than others?

2. You have an excessive sweating disorder

Yes, that’s a thing—it’s called hyperhidrosis—and, according to the American Academy of Dermatology (AAD), it essentially happens when a person sweats more than necessary (yes, even while they’re sleeping).

One big difference between hyperhidrosis and run-of-the-mill sweating: Hyperhidrosis only affects specific body parts, per the AAD, specifically your palms, feet, underarms, and head.

Keep in mind though, this is excessive sweating—the AAD says hyperhidrosis can interfere with daily activities (like opening doorknobs or using computers) in those who have it.

If you think you have hyperhidrosis, talk to your dermatologist—they can prescribe specific deodorants or other methods of treatment like Botox injections to block sweat glands, per the AAD.

3. You’re actually running from something in your nightmares

This is probably the simplest explanation for those sweats: “If the sweating is chronic…sometimes it can be that the patient is totally healthy and is actually running in a dream, or frightful in a dream,” says Dr. Harry Banshick. “The sweat is the consequence of acting out the dream.”

Shah agrees, saying that anything that causes what’s called a sympathetic surge (also known as a fight-or-flight response) can lead to sweating. If you’re having ongoing, persistent nightmares, see your doctor to find out what might be causing it (stress is a big culprit).

4. Your body’s going through hormonal changes

One of the most common causes of night sweats for women is fluctuating oestrogen levels, Nandi says. “Menopause is associated with hot flashes, so it’s not uncommon for patients to report sweating even during their sleep,” Shah says.

If you’re pregnant or on your period, those hormone fluctuations could lead to night sweats, too. However, menopause tends to cause to the most persistent sweats, and if it’s truly affecting your quality of life or sleep, Shah says it’s worth talking to your doctor about.

“Sweating from menopause is unpredictable, but if you talk to your obstetric-gynaecologist about hormone replacement therapy, it could help keep your temperatures under control.”

READ MORE: Here’s how to sleep better if you’ve been feeling super tired all the time

5. You’re taking antidepressants

Patients taking antidepressants can definitely see an uptick in night sweats, Shah says, as certain classes of medications can cause an adrenergic reaction, which has to do with your adrenaline levels and leads to sweating.

If you’re taking venlafaxine (or the brand-name Effexor) or bupropion (or its brand-named Wellbutrin, Zyban, or Aplenzin), you may experience more night sweats, Shah says.

But there’s good news if you don’t want to switch your antidepressant, as Shah says there are drugs docs can prescribe to calm down the adrenergic output, which won’t counteract your mental-health needs.

6. Your body’s fighting off an infection

“Infections in general are related with changes in temperature because they come with fevers that will break, and that is obviously a common reason to sweat,” Shah says.

One rare infection that’s commonly associated with night sweats: tuberculosis, which can infect any part of your body but is well-known for its effect on your lungs. People with an immunocompromised condition, like HIV, can develop tuberculosis more easily, Shah says.

You might start sweating in your sleep before you even start coughing or realise something is wrong, Shah says, so see a doc stat if the symptoms persist.

7. You have undiagnosed lymphoma

Lymphoma—a cancer of part of the immune system, according to the U.S. National Library of Medicine (NLM)—can cause multiple symptoms like fever, changes in weight loss, and, yes, night sweats, says Shah. Essentially, your body recognises lymphoma as something it needs to fight off, and raises its temperature to try to do so, she adds.

While these “soaking sweats,” per the NLM, happen at night, heavy sweating might occur during the day for this, too, so get to your doctor. if you’re experiencing any other symptoms and they can test you for the condition, says Shah.

This article was originally published on www.womenshealthmag.com

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