Feeling cold and sleepy is common for the human body; however, experiencing both at the same time can be due to various factors, one of them being the body’s natural way of preparing for sleep. Here are a few reasons why you feel cold when sleepy. Tap to know!
Core Body Temperature
When we feel sleepy, our core body temperature drops as the brain lowers the internal temperature to conserve energy while making us sleepy.
Melatonin Release
The body releases melatonin (sleep hormone) to induce sleep, which also causes blood vessels to expand, allowing heat to escape and making us feel cold.
Sleep Deprivation
When we are sleep-deprived, our body is unable to regulate temperature properly, leading to reduced blood flow and making us feel cold.
Iron Deficiency
Some people may have iron deficiency, which can make people feel cold, especially when they are sleepy.
Circadian Rhythm
Circadian rhythm, or sleep-wake cycle, naturally lowers your internal temperature when it's close to bedtime, making us feel cold and sleepy.
Slow Metabolism
When we are sleepy, our metabolism slows down to save energy. The slowed activity of metabolism produces less internal heat, which can also make us feel cold.
Reduced Physical Activity
When it is bed time, our physical activity decreases, i.e., no physical activity means less heat generation, which makes us cold and shivering.
Information Credits
According to PubMed, we feel cold when sleepy due to decrease in core body temperature, circadian rhythm, and more. It is advisable to consult a healthcare professional for personalised suggestions.