Who You Sleep with
The combined body temperatures of those who share a bed with you or your pets can cause your room’s interior temperature to rise.
Heat is a continual consequence of metabolism in living things. The area will heat up more quickly when there are more people and the area is small.
A human’s body typically has a temperature of 98.6°F, or 37°C. Your body will absorb heat and actually have a cooling impact on the room if the temperature is higher than this.
Hormones
Night sweats or hot flashes may result from hormonal imbalances.
Due to changes in the levels of the hormones estrogen and progesterone, night sweats are common symptoms of premenstrual syndrome in females. [1]
Hot flashes and night sweats are two of the most typical menopause symptoms. These symptoms are thought to be brought on by decreased estrogen and other hormonal changes that aren’t entirely understood.
Additionally, hormonal changes brought on by pregnancy raise your body’s temperature and increase blood flow.
Two further potential causes of why you feel hot and sweaty at night include hyperthyroidism and obstructive sleep apnea (which can influence a range of hormones). [2]