Why Do I Sweat When I Sleep During The Day?

Why Do I Sweat When I Sleep During The Day?

Sweating during sleep, whether it’s at night or during the day, can be caused by a variety of factors, ranging from the environment to health conditions. If you find yourself sweating excessively while sleeping during the day, it could be due to changes in your body’s natural rhythms, the room temperature, bedding materials, or underlying health issues. Let’s delve deeper into these factors to understand why sweating during daytime sleep occurs.

Disruption of Circadian Rhythms

Your body’s circadian rhythm is a natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours. It is highly influenced by light and darkness in your environment. When you sleep during the night, your body is aligned with its natural circadian rhythm, which helps maintain a stable body temperature. However, sleeping during the day disrupts this rhythm because your body is accustomed to being awake during daylight hours.

This disruption can result in your body struggling to regulate its temperature effectively, leading to night sweats even during daytime rest. This misalignment can cause your body to release more heat, and as a result, you might wake up feeling sweaty and uncomfortable.

Effects of Sunlight and Room Temperature

Daytime temperatures are generally higher than nighttime temperatures, especially if you sleep in a room that is exposed to direct sunlight. Your body temperature also naturally rises in the afternoon, which might exacerbate sweating if you nap during this time.

Ensure that your sleeping environment is cool and dark for optimal rest during the day. Use blackout curtains to block out sunlight and consider using a fan or air conditioner to keep the room temperature low. Ideally, the room temperature for comfortable sleep should be around 60-67 degrees Fahrenheit (15-19 degrees Celsius).

Choice of Bedding and Sleepwear

The materials of your bedding and sleepwear can significantly influence how much you sweat during sleep. Synthetic fabrics tend to trap heat and moisture, which can make you feel hotter and cause you to sweat more. To counteract this, opt for breathable, natural fibers like cotton, linen, or bamboo. These materials wick moisture away from your skin and allow better air circulation, helping to regulate your body temperature.

Additionally, consider using moisture-wicking sheets and pillowcases designed specifically to keep you cool. Feather or down-filled duvets might also be contributing to excessive warmth and should be replaced with lighter, breathable alternatives during warmer months.

Meal Timing and Diet

Eating a large meal before sleeping can raise your body temperature as your body works to digest the food. This spike in metabolism can create additional heat. If you need to eat before sleeping, try to keep it light and avoid spicy or fatty foods that can increase body temperature.

Caffeine and alcohol consumption can also lead to sweating. Both substances affect the nervous system and can cause increased heart rates and sweating. Reducing or eliminating these from your diet, especially before sleep, could help alleviate sweating.

Stress and Anxiety

Emotional factors such as stress and anxiety can contribute to sweating during sleep. When stressed or anxious, your body activates the sympathetic nervous system, which can induce sweating as part of the “fight or flight” response.

Engaging in calming activities before sleep, such as reading, meditation, or gentle stretching, can help reduce stress and create a more peaceful state of mind conducive to restful sleep.


Certain medications can cause sweating as a side effect. Antidepressants, hormonal treatments, and medications for conditions such as high blood pressure (beta-blockers and certain antihypertensives) can lead to increased sweating. If you suspect your medication is causing excessive sweating, consult your healthcare provider for alternatives or adjustments.

Health Conditions

Several health conditions can cause excessive sweating during sleep. Hyperhidrosis is a condition characterized by abnormally increased sweating. This can occur even during sleep. Night sweats can also be a symptom of other medical conditions such as infections, thyroid issues, and hormonal imbalances, especially in women experiencing menopause.

If you experience excessive sweating frequently and it is affecting your quality of sleep and daily life, it’s important to seek medical advice to identify any underlying health concerns.

Adjust Your Sleep Schedule

If possible, try to align your sleep schedule more closely with natural light-dark cycles. If you work night shifts or have irregular hours, aim to minimize disruptions to your circadian rhythm. When transitioning between shifts, gradually adjust your sleep schedule rather than making abrupt changes. Consistent sleep patterns can help your body better regulate temperature.

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Finishing Thoughts

Sweating during the day while sleeping can be due to a range of factors from environmental influences to health-related issues. To mitigate this, consider maintaining a cool sleeping environment, choosing appropriate bedding and sleepwear, and adjusting your diet and lifestyle to reduce factors that could induce sweating. If excessive sweating persists, consulting a healthcare professional is recommended to rule out any medical conditions.

Ultimately, creating a comfortable and peaceful sleeping environment and adopting healthy habits can help improve your overall sleep quality and reduce sweating regardless of the time of day.


  • Ashton Roberts

    I love learning and sharing everything about sleep. I am one of the energetic editors here at GoodSleepHub, where I talk about how to get a better night's sleep. When I'm not writing, I'm probably walking my dog Luna or trying out new sleeping gadgets. My goal is to help you sleep easier and better. Join me, and let's find simple ways to enjoy great sleep every night!

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