Herbie Murray
Feeling hot while sleeping, or sleeping hot, is a common problem. It can be caused by various factors, including external ones such as the temperature of the room, bedding, and pajamas, as well as internal factors like hormonal changes, caffeine consumption, and certain health conditions. Memory foam mattresses and dense bedding products that restrict airflow can also contribute to sleeping hot. Additionally, sharing a bed with a partner or a pet can raise the temperature under the covers and in the room. Understanding the causes of sleeping hot can help individuals make modifications to improve their sleep quality.
| Characteristics | Values |
|---|---|
| Core body temperature | Naturally dips to promote sleep |
| Skin temperature | Rises to release heat |
| External factors | Bedding, clothing, pre-bed activities, hydration, hormones, illness, medication, diet, exercise, caffeine, alcohol, health conditions |
| Sleep environment | Temperature, bedding, mattress, pillow, blankets, pets, partners |
| Hormonal fluctuations | Ovulatory cycles, pregnancy, menopause |
| Mattress | Memory foam, gel-infused, ventilated |
| Bedding | Lightweight, breathable, moisture-wicking, thread count, weave, fibre |
| Temperature | 60–68°F (60–67°F according to one source) |
| Solutions | Lower room temperature, lightweight bedding, breathable clothing, avoid caffeine and alcohol, adjust diet and exercise |
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What You'll Learn
Hormonal changes and fluctuations
Progesterone levels rise after ovulation to prepare the body for potential pregnancy. If pregnancy does not occur, progesterone levels drop, causing the uterine lining to shed and starting the menstrual cycle. This dramatic decrease in progesterone levels can make it difficult for some women to get quality sleep during their premenstrual syndrome (PMS) days.
Hormone changes during perimenopause and menopause can cause the hypothalamus, the part of the body that controls body heat, to have trouble regulating temperature. This can lead to hot flashes, which are a common symptom of menopause, causing sleep disturbances. Hormone replacement therapy, such as estrogen replacement therapy, may help menopausal women sleep more soundly.
Additionally, lower levels of progesterone can make women more irritable and less able to relax, impacting their sleep. Research suggests that progesterone and estrogen may protect women against sleep apnea, but menopause removes this benefit. Older women are just as likely as men to develop sleep apnea, and oxygen deprivation can cause multiple awakenings during the night.
Hormonal fluctuations throughout a woman's life, including puberty, menstruation, pregnancy, and menopause, can affect sleep. These hormonal shifts can impact a woman's ability to fall asleep and the quality of her sleep, contributing to sleep disturbances and insomnia.
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Mattress and bedding choices
If you're someone who sleeps hot, it's important to consider the mattress and bedding you use. The mattress structure is often the main reason why a bed retains heat. Dense memory foam mattresses, for example, are notorious for heat retention and night sweats due to their dense structure and lack of interconnected air channels.
When choosing a mattress, opt for one that promotes airflow and breathability. Innerspring and hybrid mattresses are typically the coolest beds to sleep on. Innerspring mattresses have coil systems that help airflow circulate more freely, while hybrid mattresses blend the comfort of foam with the breathability of innerspring coils. The Brooklyn Bedding Aurora Luxe, for instance, is a hybrid mattress that utilizes cooling technology throughout each layer, making it a top choice for hot sleepers. If you're not ready to invest in a new mattress, consider a cooling mattress topper, which can help regulate the temperature of your current mattress.
In addition to your mattress, your bedding choices play a significant role in keeping you cool. Opt for natural fibres like cotton, linen, bamboo, and silk, which are all breathable and moisture-wicking. Cotton sheets, especially those with a percale weave, offer a versatile option that works well across diverse climates, balancing softness and breathability. Linen sheets are also a great choice for hot and dry conditions, as they are light, durable, eco-friendly, and allow for excellent airflow. Bamboo sheets are ideal for humid environments, as they help regulate temperature and manage moisture. Silk sheets are also a good option, as they are naturally good at regulating temperature and feel cool to the touch, but they do require more care when washing. For pillow options, duck feathers and down, goose down, and organic wool are recommended, as they provide airflow and release heat when it gets too hot.
Lastly, it's important to consider other factors that can influence your body temperature while sleeping, such as room temperature, ventilation, and your diet. Keep your bedroom well-ventilated by opening windows or using a fan to move the air around. Additionally, avoid eating spicy or heavy meals, drinking alcohol, or consuming too much liquid before bed, as these can raise your body temperature and disrupt your sleep.
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Pre-bed activities and diet
To avoid sleeping hot, it's important to consider your pre-bed activities and diet.
Firstly, your pre-bed activities should be calming and help you relax. This is because stress and an overactive mind can increase your body temperature, making it harder to fall asleep. A daily bedtime routine can be beneficial, signalling to your brain that it's time to wind down. This routine should be tailored to your specific needs and sleep environment. For example, turning off screens, meditating, reading a book, or adjusting your bedroom environment by making it cooler, darker, and quieter can all be part of your bedtime routine. Relaxation techniques such as deep breathing exercises, progressive muscle relaxation, and mindfulness meditation can also help release physical and mental tension.
Additionally, yoga and simple stretches before bed can improve sleep quality and prevent cramping. It's also important to avoid heavy meals and alcoholic beverages before bed, as these can lead to indigestion and disrupt your sleep. Instead, opt for a light snack, such as fruit or yogurt, which can help settle your stomach without making you feel too full. Cherries, grapes, kiwi, rice, and nuts are all sleep-promoting foods that can help you drift off. Non-caffeinated herbal teas, especially those with chamomile or lavender, are another great way to calm your mind and induce sleep.
Finally, it's worth noting that your choice of bedding and pajamas can also impact your sleep temperature. Heavy pajamas and fabrics that trap heat, such as memory foam mattresses, can increase your skin and core body temperature, leading to fragmented sleep. Opt for lightweight and breathable bedding and pajamas to stay cool and comfortable throughout the night.
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Health conditions and medications
Sleeping hot is a common issue that can be caused by a variety of factors, including health conditions and medications.
Health Conditions
Several health conditions can affect an individual's body temperature, leading to sleeping hot. Hyperthyroidism, an overactive thyroid gland, can cause excessive sweating, an increase in body temperature, intolerance to heat, and sleep problems. Other conditions such as chronic stress, hyperhidrosis, coronary heart disease, and certain cancers (e.g., breast and prostate cancer) can also contribute to feeling hot at night. Additionally, conditions like hypoglycemia, menopause, and hormone disorders can lead to night sweats and hot flashes.
Underlying health issues, such as damaged nerves, can cause heat intolerance, sweating, and burning sensations in the arms and legs, which may be more pronounced at night. Furthermore, certain infections and illnesses can elevate body temperature, with flu, strep throat, pneumonia, and bacterial infections being potential culprits.
Medications
Medications can also play a significant role in sleeping hot. Certain types of steroids, painkillers like aspirin or acetaminophen, hormone therapy medications, and diabetes medications can influence body temperature and disrupt sleep. Antidepressants are commonly associated with excessive sweating and increased body temperature. Additionally, opioids and hormones can also lead to night sweats.
If you suspect that medications are the cause of your sleeping hot, it is recommended to consult your doctor about possible alternatives.
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Environmental factors and climate
The optimal temperature for sleep typically falls within a range of 60 to 68 degrees Fahrenheit. However, the specific temperature preferences vary among individuals, influenced by factors such as personal preference, age, health conditions, and climate (including humidity). For example, individuals in hot and humid climates may find it challenging to achieve comfortable sleep due to the combined effects of outdoor warmth and indoor heat retention.
To optimize sleep in warmer climates, it is essential to consider the sleep environment. This includes the use of lightweight, breathable bedding and moisture-wicking materials that facilitate airflow and prevent the trapping of body heat. Additionally, reducing room temperature with air conditioning or fans, opening windows to create a cross breeze, and minimizing the use of insulating fabrics or memory foam mattresses can help alleviate the sensation of sleeping hot.
Environmental noise is another significant factor that can influence sleep quality. Intermittent sounds, such as occasional honking or revving cars, have been found to be more disruptive than continuous noise. Urban residents, in particular, may experience chronic sleep deprivation due to higher levels of environmental noise. Similarly, exposure to electronic media and artificial light in the evening can delay the internal clock, leading to a preference for later sleep times and potential sleep disturbances.
Overall, the interplay between environmental factors, climate, and individual preferences shapes the sleep experience. Understanding these factors can help individuals make informed choices to improve their sleep quality and overall well-being.
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Frequently asked questions
Sleeping hot, or being a "hot sleeper", means getting warm and sweaty while sleeping. This can cause discomfort and interrupt sleep and circadian rhythms.
There are many factors that can cause sleeping hot, including:
- Room temperature
- Mattress material
- Bedding and pyjamas
- Pre-bed activities
- Hydration level
- Hormones
- Illness
According to a Gallup survey of nearly 4,000 people, over half of adults in the US experience sleeping "too hot" at least occasionally. The survey also found that 18% of women and 10% of men feel too hot while sleeping.
There are several things that can be done to prevent sleeping hot, including:
- Lowering the temperature in the room
- Using lightweight, breathable bedding and pyjamas
- Avoiding insulating fabrics such as fleece and down
- Reducing caffeine and alcohol consumption
- Drinking plenty of water
