Postpartum night sweats: Also known as your own private summer

Night sweats: Put this on the list of things no one told me about when I had my first baby. If you’re experiencing postpartum night sweats, you’ll know it—mostly since you likely have difficulty sleeping because you’re so darn hot. But other symptoms might occur as well—strong body odor, feeling soaked or drenched, and being tired and irritable… on top of already being tired and irritable.

But annoying as night sweats may be, your body is doing exactly what it needs to do to keep you healthy postpartum. Your body takes on 50% more blood and body fluids during pregnancy to support your baby’s growth. This fluid is no longer needed after you give birth. According to the Mayo Clinic, postpartum sweating is your body’s way of flushing out all the excess fluids that helped keep you and your baby healthy during your pregnancy.

Related: Fatigue, hot flashes, insomnia—could it be perimenopause, or is it your thyroid?

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What causes night sweats?

While pregnant, your body produces large amounts of two key hormones—progesterone and estrogen. After you have your baby, hormone levels change dramatically as your body adjusts to not being pregnant anymore. These changes can increase your body temperature at night, and like menopausal hot flashes, make you sweat. “During pregnancy, levels of estrogen and progesterone rise. After birth, these levels fall. Low estrogen levels mimic what happens in menopause, and some patients experience mood swings, vaginal dryness, along with night sweats.” explains Dr. Dara Matseone-Peterssen, MD, MPH, chief of general obstetrics and gynecology at New York-Presbyterian Allen Hospital, in Yahoo.

This happens even more if you are breastfeeding, because rising levels of prolactin—a hormone necessary for breastfeeding—also act to keep estrogen levels low. “The reason breastfeeding moms get night sweats is because exclusive breastfeeding affects your hormones, suppressing ovulation and your period. It’s kind of like menopause, which is why women have similar symptoms,” Dr. Heather Beall, MD., an obstetrician and gynecologist at Northwestern Medicine McHenry Hospital, says to Yahoo.

Related: Here’s how to tell if you’re in perimenopause

How long do postpartum night sweats last? 

It usually takes about two weeks after you have your baby for your hormone levels to reset to their pre-pregnancy levels. Night sweats should gradually decline after this time, and typically last no longer than 6 weeks, although some symptoms may continue longer. In a year-long longitudinal study conducted in Japan, 29% of postpartum women complained of excessive sweating at night, and the proportion of women with hot flashes peaked at 2 weeks postpartum. 

Managing postpartum night sweats

When you are adjusting to taking care of life outside your womb, and your body is recovering from birth and rebalancing its hormones, instinctively you might find yourself drawn to natural methods to find your personal remedy for relief, especially if you are breastfeeding. Good thing Mother Nature has many options you can rely on to help.

1. Stay cool

• Open your windows to boost airflow
• Place a fan beside your bed
• Turn on the air conditioning in your bedroom
• Use lightweight sheets and layered bed covers
• Sleep on a towel that can be easily swapped out
• Cool yourself by putting a cold damp washcloth on your neck, armpits and groin

2. Drink some water

As fluids or “water weight” leaves your body as sweat or urine, you still will need to drink lots of water to stay hydrated. Drinking water before you’re thirsty will prevent dehydration and help your body recover after pregnancy, returning to normal body functions. “Stick with water, especially if you’re nursing, to replace the fluids you sweat off,” says Dr. Matseoane-Peterssen. 

Related: The 5 doctor appointments to make for yourself each year

3. Eat some soy

Since postpartum hormonal shifts can mimic menopause, options for relief of menopausal hot flashes can often be effective for postpartum night sweats. In a small pilot study in India, 50 peri- and postmenopausal women were prescribed 100 mg soy isoflavones for 12 weeks. The researchers found that taking isoflavone soy supplements could significantly relieve frequency and duration of hot flash symptoms. These plant-based estrogens work like estrogen in your body, but less strongly. Be sure to talk to your doctor first before starting any new supplement regimens.

But postpartum mamas don’t necessarily have to rely on supplements. You can easily incorporate soy isoflavones into your diet by eating more soy-based foods. The highest levels of isoflavones are found in unprocessed sources of soy, like edamame, tempeh, miso, soymilk, and tofu.

4. Switch to natural fibers

For so many reasons, the longer you are pregnant, the harder it can be to sleep. And after your baby arrives, night sweats and other causes of discomfort during the night can make it even more difficult for you to get enough sleep. Sleeping in natural fibers—like cotton, linen or silk—can help your body’s heat escape, whereas synthetic fabrics—like polyester or Lycra—can make you sweat more by preventing your body from losing heat. Sleeping in tight jammies can also trap heat. Cotton or linen sheets can also help keep you cool.

5. Maintain a whole-foods diet and avoid triggers

Eating well is always a good prescription for health, but is especially helpful in mitigating these steamy postpartum symptoms. Bonus—you can improve your body’s ability to recover after pregnancy, improving both physical and mental health by increasing your intake of vegetables, fruit, whole grains, lean protein and healthy fats along with moderate exercise. 

Some mamas’ symptoms can be triggered or worsened by certain foods or drinks. Spicy foods, caffeine, alcohol, hot foods or liquids, can cause your body temperature to spike, which can cause sweating, so are best avoided. 

6. Try natural remedies

In general, pharmacological interventions are seldom used in postpartum women, especially when breastfeeding. According to a 2014 review study, relaxation training (where you focus on relaxing the muscles of each body part in turn, from your toes to your head), paced breathing and hypnosis was shown to help with hot flashes, though the authors state more research is needed to confirm the relationship. 

Additionally, the North American Menopause Society’s evidence-based position on non-hormonal management of hot flashes states that cognitive-behavioral therapy has been shown to be effective in reducing hotflashes. 

Other non-pharmacological options include introducing into your diet:

• Beets/beet juice
• Dong quai (a Chinese herb used to balance hormone excesses and deficits)
• Acupuncture
• Vitamin E

Be sure to avoid the medicinal herbs valerian root and black cohosh if you are breastfeeding, even though these also have been associated with relief of night sweats.

Understanding postpartum night sweats

During pregnancy, your body retains extra fluids to support your baby’s growth. After childbirth, your body no longer needs these fluids, leading to increased sweating as your body works to eliminate the excess. Hormonal changes, particularly a decrease in estrogen levels, can also contribute to night sweats, especially for breastfeeding moms.

How long do they last?

Postpartum night sweats typically begin a few days after childbirth and can last for several weeks. While most women notice a gradual improvement over time, it’s not uncommon for symptoms to persist for up to six weeks or longer. If you’re experiencing prolonged or severe night sweats, it’s essential to consult with your healthcare provider to rule out any underlying issues.

Coping strategies

Managing postpartum night sweats can help improve your comfort and sleep quality during this time. Here are some strategies to consider:

• Stay cool: Use fans, open windows, and lightweight bedding to help regulate your body temperature while sleeping.
• Stay hydrated: Drink plenty of water to replace fluids lost through sweating and maintain hydration levels.
• Choose natural fibers: Opt for breathable fabrics like cotton or linen for sleepwear and bedding to help wick away moisture and keep you comfortable.
• Consider dietary changes: Some foods and drinks, such as spicy foods and caffeine, can exacerbate night sweats. Avoiding these triggers may help reduce symptoms.
• Explore natural remedies: Certain supplements, herbs, and relaxation techniques may offer relief from night sweats. Be sure to consult with your healthcare provider before trying any new treatments, especially if you’re breastfeeding.

When to see a doctor

If low estrogen after delivery is causing your postpartum night sweats to last longer than a few weeks, making you extra irritable and sleepy (and generally affecting your quality of life), or if your night sweats come with chills and a fever, contact your healthcare provider to rule out an infection or other conditions, like hyperthyroidism and diabetes. 

Occasionally, medication you take can also cause night sweats, so your doctor might want to check your blood sugar levels and your thyroid hormone levels and make adjustments. Lastly, always talk to your doctor before making dietary changes or introducing supplements, especially while breastfeeding.

Postpartum night sweats: Frequently Asked Questions

1. What causes postpartum night sweats?

Postpartum night sweats are primarily attributed to hormonal changes that occur after childbirth. A rapid decrease in estrogen levels, combined with other hormonal fluctuations, can trigger the body’s thermoregulatory system, leading to increased sweating, especially at night. Breastfeeding can further exacerbate these hormonal changes.

2. How long do postpartum night sweats last?

Postpartum night sweats usually begin a few days after giving birth and can last for several weeks. While most women experience a gradual improvement over time, it’s not uncommon for symptoms to persist for up to six weeks or longer. If symptoms persist beyond this timeframe or are severe, it’s essential to consult with a healthcare provider.

3. Are postpartum night sweats normal?

Yes, postpartum night sweats are considered a normal part of the postnatal period for many women. The hormonal changes and fluid shifts that occur after childbirth can disrupt the body’s temperature regulation, leading to increased sweating, particularly during sleep. However, if you have concerns about the severity or duration of your symptoms, it’s advisable to seek medical advice.

4. Can postpartum night sweats be prevented?

While it may not be possible to prevent postpartum night sweats entirely, there are steps you can take to alleviate symptoms and improve comfort. These may include staying cool during sleep, staying hydrated, choosing breathable bedding and sleepwear, and avoiding triggers such as spicy foods and caffeine.

5. When should I seek medical help for postpartum night sweats?

While postpartum night sweats are generally considered normal, certain symptoms may indicate an underlying issue that requires medical attention. If you experience persistent night sweats accompanied by fever, chills, or other concerning symptoms, it’s essential to consult with your healthcare provider. They can assess your symptoms and provide appropriate guidance and treatment if necessary.

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A version of this story was originally published on Dec. 17, 2021. It has been updated.