Night Sweats in Women: Causes, When to Worry, and How to Stop Them

You wake up in the middle of the night and your pajamas are soaked. Your sheets are damp, your pillow is wet, and you feel hot, then suddenly chilled. You change clothes, flip the pillow, and try to get back to sleep, only for it to happen again. Night sweats are one of the most common reasons women search for help with sleep, and one of the most disruptive symptoms of perimenopause and menopause.

This guide explains what night sweats are, why they happen, the other possible causes worth knowing about, when to see a doctor, and what you can do tonight to sleep cooler and drier.

What are night sweats?

Night sweats are episodes of heavy sweating during sleep that can soak your nightclothes or bedding. They’re different from simply feeling warm under too many blankets. True night sweats often wake you up, leave you drenched, and happen even when your bedroom isn’t especially hot.

In menopause, night sweats are essentially hot flashes that happen at night. Together, doctors call hot flashes and night sweats vasomotor symptoms.

Why menopause causes night sweats

Your brain has a built-in thermostat that keeps your body temperature in a comfortable range. During perimenopause and menopause, falling and fluctuating estrogen levels narrow that comfortable range. Even a small rise in core body temperature can make your brain think you’re overheating. It responds by trying to cool you down quickly: blood vessels in your skin widen, your heart rate rises, and you start to sweat.

At night, this can happen several times, pulling you out of deep sleep. Even if you don’t fully wake up, the disruption can leave you exhausted the next day.

How long do night sweats last?

It varies a lot. For some women, night sweats are mild and last a year or two. For others, they continue for many years. A large long-term study of women in the U.S. found that frequent hot flashes and night sweats lasted a median of about seven years, often starting in perimenopause before periods stop.

Other causes of night sweats

Menopause is the most common cause of night sweats in midlife women, but it isn’t the only one. Other possible causes include:

• Medications, including some antidepressants, diabetes medications, hormone treatments, and fever reducers
• Infections, which can cause fever and sweating
• An overactive thyroid
• Low blood sugar, especially in people who take diabetes medications
• Sleep apnea, which becomes more common after menopause
• Anxiety and stress
• Alcohol and caffeine
• Less commonly, certain cancers, such as lymphoma

This is why it’s worth mentioning night sweats to your doctor, especially if they come with other symptoms.

When to see a doctor

Talk to your doctor if your night sweats:

• Come with a fever, unexplained weight loss, or swollen glands
• Happen alongside a cough, pain or other new symptoms
• Started suddenly or are getting worse
• Happen frequently and disrupt your sleep
• Began after starting a new medication
• Occur when you’re not in the typical age range for perimenopause or menopause

Your doctor can help figure out the cause and talk with you about treatment.

How to stop night sweats: what you can do tonight

Cool your bedroom

• Aim for a cool bedroom, around 65 to 68°F.
• Use a fan to keep air moving. A bedside fan pointed at you can bring quick relief.
• Open a window if it’s safe and cool outside.
• Close blinds during the day to keep heat out.

Choose breathable bedding

• Pick sheets made from cotton percale, linen, bamboo-based fabric, or other cooling materials.
• Layer lighter blankets rather than using one heavy comforter, so you can adjust without fully waking up.
• Consider a cooling pillow or mattress topper.
• If you share a bed, use separate blankets so each person can adjust.

Wear the right sleepwear

• Choose lightweight, loose-fitting pajamas in moisture-wicking or breathable fabrics.
• Skip flannel and heavy cotton, which hold onto sweat.
• Keep a spare set of pajamas and a towel by the bed for quick changes.

Keep cool tools nearby

• A glass of ice water on your nightstand
• A cooling face mist
• A cool, damp cloth for your face, neck, and wrists
• An extra pillowcase to swap when one gets damp

Adjust your evening habits

• Limit alcohol, especially in the evening, since it can trigger night sweats.
• Cut back on caffeine, particularly after midday.
• Avoid spicy foods at dinner.
• Eat dinner earlier so you’re not digesting a heavy meal at bedtime.
• Take a lukewarm shower before bed rather than a hot one.
• Try slow breathing when you feel a night sweat starting, to help you stay calm and settle back to sleep.

Daytime habits that help

• Stay active. Regular exercise supports sleep and overall health. Try to finish vigorous workouts a few hours before bed.
• Manage stress. Stress can make hot flashes and night sweats more frequent.
• Keep a symptom diary. Track night sweats, what you ate and drank, and how you slept to spot your personal triggers.
• Maintain a healthy weight. For some women, losing extra weight can reduce hot flashes and night sweats.
• Don’t smoke. Smoking is linked with more frequent hot flashes.

Medical treatments for night sweats

If night sweats are frequent, severe, or affecting your quality of life, talk to your doctor. Options may include:

• Hormone therapy, which is the most effective treatment for hot flashes and night sweats for many women, though it isn’t right for everyone
• Non-hormone prescription medications, including certain antidepressants and newer medicines designed specifically to target hot flashes
• Cognitive behavioral therapy (CBT), which can help reduce how much night sweats bother you and improve sleep

Your doctor can help you weigh the benefits and risks based on your health history.

The takeaway

Night sweats are common during perimenopause and menopause, caused by changes in your brain’s temperature control as estrogen falls. A cool bedroom, breathable bedding and sleepwear, cool tools by the bed and smarter evening habits can make a big difference. Because night sweats can sometimes have other causes, see your doctor if they come with fever, weight loss, or other new symptoms. With the right approach, cooler, drier and more restful nights are possible.

This article is for general information only and isn’t medical advice. Talk with your doctor about your own symptoms and treatment options.