Is turning on the light to sleep harmful to human body?

When people fall asleep at night, the brain will secrete melatonin, which is most abundant in the middle of the night 1 1 until the early morning of the next day, and will stop secreting after dawn.

When you turn on the light to sleep, the secretion of melatonin will be inhibited, which will not only affect the quality of sleep, but also affect the body's immunity and even lead to cancer.

There is an endocrine organ in the human brain that teaches the pineal gland. One of the functions of the pineal gland is to secrete a large amount of melatonin when people fall asleep at night. The secretion of melatonin can inhibit the excitability of human sympathetic nerve, lower blood pressure, slow down heart rate, let the heart breathe, enhance human immune function, restore human fatigue, and even kill cancer cells. If you sleep with an eye patch, your eyes will not be exposed to light at night, and even if you sleep with the lights on, it will not affect the secretion of melatonin.