Night sweats are controllable for most people through a combination of environment changes, trigger avoidance, and, when needed, medical treatment. The right approach depends on what’s driving them, which can range from a warm bedroom to hormonal shifts to medication side effects. Here’s how to identify your triggers and reduce episodes.
Cool Your Sleeping Environment
The simplest fix is often the most effective. Keep your bedroom between 60 and 67°F (15 to 19°C). Anything above 70°F is too warm for quality sleep and makes night sweats worse. A fan or air conditioning helps, but the thermostat setting matters more than airflow alone because it determines the baseline air temperature your body is trying to regulate against all night.
Beyond temperature, think about layering. Use a light blanket you can easily push off rather than a heavy comforter. Sleeping in lightweight, loose clothing (or none) gives your skin more room to release heat. If you share a bed, separate blankets let each person regulate independently.
Choose the Right Bedding Materials
What your sheets are made of has a measurable impact on how much heat and moisture stays trapped against your skin. Cotton and polyester are the worst performers. Bamboo and Tencel (a fiber made from eucalyptus wood pulp) are both significantly more breathable and better at pulling sweat away from your body.
Bamboo sheets feel noticeably cold when you first get into bed, which many people find immediately satisfying. The fibers allow strong airflow and move moisture toward the outer surface for evaporation, preventing that clammy “heat trap” feeling underneath you. Tencel sheets are less dramatically cool at first touch but outperform bamboo where it counts most for night sweats: they absorb more sweat, release it into the air faster, and maintain a steadier temperature throughout the night. For heavy sweaters, Tencel is generally the better pick. It also holds up better in the wash and is less prone to pilling over time.
Eliminate Common Triggers
Several substances raise your core body temperature or destabilize your body’s heat regulation, especially in the hours before bed.
- Alcohol: It dilates blood vessels and disrupts sleep architecture, both of which promote sweating. Even moderate drinking in the evening can trigger episodes.
- Caffeine: A Mayo Clinic study found that caffeine intake was associated with more bothersome hot flashes and night sweats in postmenopausal women. Cutting it after noon, or eliminating it entirely for a trial period, is worth testing regardless of your age or sex.
- Spicy foods and hot beverages: Both raise core temperature. Eating them close to bedtime is a common, easily fixable trigger.
- Tobacco: Nicotine affects circulation and thermoregulation. Smokers report higher rates of night sweats.
Try eliminating all four for two weeks. If your night sweats improve, reintroduce them one at a time to identify which ones matter most for you.
Check Your Medications
About 20% of people taking antidepressants experience excessive sweating, often showing up as episodic bursts concentrated on the scalp, face, neck, and chest. This side effect tends to persist throughout treatment, not just during the adjustment period. Among antidepressants, venlafaxine, bupropion, and reboxetine are the most likely culprits.
Antidepressants aren’t the only class that causes this. Blood pressure medications, hormone therapies, diabetes drugs, and some over-the-counter medications like aspirin or acetaminophen can also contribute. If your night sweats started around the same time as a new medication, or got worse after a dose change, that connection is worth raising with your prescriber. Switching to a different drug in the same class sometimes resolves the problem entirely.
Hormonal Night Sweats
For people going through perimenopause or menopause, night sweats are one of the most disruptive symptoms. The mechanism involves the brain’s internal thermostat. During perimenopause, estrogen and progesterone levels swing in wide, unpredictable variations. These hormonal shifts alter the thermoregulatory center in the brain, narrowing the range of body temperature your brain considers “normal.” A tiny increase that wouldn’t have triggered a response before now sets off a full cooling cascade: blood vessels dilate, heart rate increases, and sweat glands activate.
Hormone replacement therapy remains the most effective treatment. Up to 90% of hot flashes and night sweats disappear within three months of starting HRT. For people who can’t or prefer not to use hormones, newer options exist. The FDA has approved a non-hormonal medication that works by blocking a specific signal in the brain’s temperature control center, directly addressing the mechanism that causes the sweating rather than replacing hormones. This provides a targeted alternative for people with contraindications to estrogen, such as a history of certain cancers or blood clots.
Male hypogonadism (low testosterone) also drives night sweats through a similar thermoregulatory disruption. Men experiencing night sweats alongside fatigue, low libido, or mood changes may have a hormonal component worth investigating.
Behavioral Strategies That Help
Cognitive behavioral therapy has been studied specifically for managing hot flashes and night sweats. It doesn’t significantly reduce how often episodes happen, but it does reduce the daily interference and stress they cause. That distinction matters because the distress from night sweats, including the anxiety about when the next one will come and the frustration of disrupted sleep, often causes more harm than the sweating itself. CBT helps by changing how you respond to episodes, breaking the cycle of dread and hypervigilance that can make symptoms feel worse than they are.
Other practical habits that help: keep a cold glass of water on your nightstand, use a cooling pillow or gel pad, and take a lukewarm (not hot) shower before bed. Exercise improves thermoregulation over time, but intense workouts within two to three hours of bedtime can raise your core temperature enough to trigger sweating. Moving your workout earlier in the day is an easy test.
When Night Sweats Signal Something Else
Most night sweats have a benign explanation: a warm room, a glass of wine, hormonal changes, or a medication side effect. But persistent, drenching night sweats, especially when paired with other symptoms, can signal a condition that needs medical attention.
The combination that warrants prompt evaluation is night sweats plus unexplained weight loss, persistent fever, or both. This triad is associated with lymphoma and leukemia, though these cancers rarely present with night sweats alone. Infections including tuberculosis, HIV, endocarditis (infection of the heart valves), and certain fungal infections also cause night sweats, typically alongside fever, fatigue, or other systemic symptoms. Endocrine conditions like hyperthyroidism and diabetes can be responsible as well, and both are easily tested for with routine bloodwork.
If your night sweats are new, persistent for more than a few weeks, severe enough to soak your sheets, or accompanied by any of these additional symptoms, getting a basic evaluation is straightforward. A physical exam and standard blood tests can rule out the serious possibilities quickly.