Night sweats improve once you identify what’s triggering them and make targeted changes to your sleep environment, habits, or underlying health. For many people, simple adjustments like cooling the bedroom to 60–67°F and avoiding alcohol before bed are enough. For others, night sweats signal a hormonal shift or medication side effect that needs a different approach.
Why Night Sweats Happen
Your hypothalamus, the brain’s built-in thermostat, controls when your body sweats. It monitors your core temperature and sends signals to widen blood vessels in your skin and activate sweat glands when it senses you’re too warm. Night sweats happen when something disrupts that system, either by raising your actual body temperature or by resetting the threshold at which your brain decides you’re overheating. The result is the same: you wake up drenched, sometimes with sheets soaked through, even though your room isn’t particularly hot.
The triggers range from completely harmless (a heavy duvet, a warm room) to medically significant. The first step in managing night sweats is figuring out which category yours fall into.
Cool Your Sleep Environment
The Cleveland Clinic recommends keeping your bedroom between 60 and 67°F (15–19°C) for optimal sleep. If you’re prone to night sweats, aim for the lower end of that range. Think of your bedroom as a cave: cool, dark, and quiet.
Beyond the thermostat, a few changes make a real difference. Swap synthetic sheets for breathable fabrics like cotton or bamboo. Use a lighter blanket or layer thinner covers so you can kick one off without waking fully. Moisture-wicking sleepwear, originally designed for athletes, pulls sweat away from your skin and helps it evaporate faster. Some people find that a cooling mattress pad or pillow with gel inserts keeps their core temperature more stable through the night.
If you share a bed, consider separate blankets. Your partner’s body heat raises the microclimate under your covers more than you’d expect.
Avoid Common Triggers Before Bed
Alcohol is one of the most reliable night sweat triggers. Drinking increases your heart rate and widens blood vessels in your skin, which pushes heat to the surface and triggers perspiration. Even moderate amounts can do this, and the effect peaks a few hours after your last drink, right around the time you’re deepest in sleep. If you notice a pattern on nights you drink, try cutting off alcohol at least three to four hours before bed, or skip it entirely on nights when sweats are worst.
Caffeine and spicy food can have similar effects, though they vary more from person to person. Caffeine stimulates your nervous system and can raise your core temperature subtly. Spicy foods contain compounds that activate heat receptors in your body, essentially tricking your brain into thinking you’re warmer than you are. Both are worth eliminating in the evening for a few weeks to see if your sweats improve.
Stress and acid reflux can also activate your body’s adrenaline response, which triggers sweating. If you notice night sweats on particularly anxious days, a wind-down routine before bed (breathing exercises, limiting screens, journaling) can help calm that stress response.
Hormonal Causes in Women
Menopause is the most common hormonal cause of night sweats. As estrogen levels drop, the hypothalamus becomes more sensitive to small changes in body temperature, narrowing the range your brain considers “normal.” A tiny uptick that wouldn’t have registered before now triggers a full vasomotor response: flushing, sweating, then chills as the sweat evaporates.
Hormone replacement therapy remains one of the most effective treatments, but it’s not right for everyone. For women who can’t or prefer not to use hormones, the FDA approved a non-hormonal option called fezolinetant (Veozah) in 2023. It works by blocking a specific receptor in the brain that plays a direct role in temperature regulation. It’s taken as a single daily pill. Side effects can include abdominal pain, diarrhea, and in some cases elevated liver enzymes, so liver function is monitored during treatment. It’s not appropriate for people with cirrhosis or severe kidney disease.
Perimenopause can cause the same symptoms years before your period actually stops, so don’t assume you’re “too young” for hormonal night sweats if you’re in your 40s.
Hormonal Causes in Men
Low testosterone causes night sweats in men through a similar mechanism. When sex hormone levels drop, the hypothalamus becomes unstable in its temperature regulation. The nervous system signals blood vessels in the skin to dilate, producing a warm flush, and then the body overcompensates with a cold, clammy sweat. This is the same hot flash cycle that women experience during menopause, and it’s more common in men than most people realize.
Testosterone replacement therapy often resolves the problem. Other hormonal treatments have shown 80–90% reductions in hot flash frequency in clinical studies, though some come with side effects like bloating and weight gain. If you’re a man experiencing regular night sweats along with fatigue, low libido, or mood changes, a simple blood test can check your testosterone levels.
Medication Side Effects
Antidepressants are a frequent and underrecognized cause of night sweats. Depending on the specific drug, excessive sweating occurs in roughly 7–19% of people taking SSRIs. The exact mechanism isn’t fully understood, but it appears to involve the way these medications affect the nervous system’s control of sweat glands through adrenaline-related pathways.
If your night sweats started or worsened after beginning an antidepressant, that connection is worth raising with your prescriber. Adjusting the dose, switching to a different medication, or adding a treatment to counteract the sweating are all options. Don’t stop an antidepressant on your own because of night sweats, as withdrawal effects can be significant.
Other medications that commonly cause night sweats include certain blood pressure drugs, diabetes medications that can cause low blood sugar overnight, and fever-reducing medications like aspirin or acetaminophen (as the fever breaks, sweating follows).
Signs That Night Sweats Need Medical Attention
Occasional night sweats after a warm evening, a stressful day, or a few drinks are rarely concerning. The pattern that warrants attention is persistent, drenching night sweats that soak through your clothes or sheets and have no obvious trigger.
Pay attention if night sweats come alongside any of these: unexplained weight loss, persistent fevers or chills, swollen lymph nodes (lumps in your neck, armpits, or groin), persistent fatigue, itchy skin, or bone pain. This combination, sometimes called “B symptoms,” can be an early sign of lymphoma or other conditions that need prompt evaluation. Infections like tuberculosis and certain autoimmune disorders can also cause drenching night sweats.
A good rule of thumb: if your night sweats have been happening regularly for more than two to three weeks, are severe enough to disrupt your sleep, and don’t improve with the environmental changes described above, it’s worth getting checked out. A basic workup including blood tests can rule out most serious causes quickly.