According to the research results published by foreign researchers on 20 13, women who live in a metropolis with more light for a long time have a higher probability of developing breast cancer.

Studies have pointed out that the darkness of the bedroom during sleep can minimize the risk of breast cancer in women, so in order to prevent breast cancer, women had better turn off the lights and sleep at night.

2. Depression

According to the academic report published overseas on 20 13, compared with normal people, people with depression are more inclined to sleep with the lights on.

In addition, according to the research of Dalin Shixian, an associate professor at Nara Medical University, turning on the light at night is easy to disturb the body clock, and the most effective way to prevent depression is to fully enjoy sunbathing during the day.

3. Obesity

Oxford University in England once conducted a survey on the obesity of women who used to sleep with the lights on and those who used to sleep with the lights off. The results show that women who are used to sleeping with lights on have relatively high body mass index and relatively large waist circumference.

In addition, Nara Medical University also published an article saying that turning on the lights at night will increase the risk of obesity. So people who want to lose weight must pay attention.

Extended data:

Sleeping with the lights on is a bad habit, and its pathological essence is fear of darkness. Most of this horror of darkness began in childhood, because in childhood, we often heard stories about ghosts and gods.

The background, content and characters of such stories often appear at night or in the invisible darkness to show vividness and mystery. Over time, people will be afraid of monsters and darkness together, forming a dependence on lights, leading to fear of turning off the lights to sleep, which is also one of the main reasons for turning off the lights to sleep.

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 immunity of the human body and even lead to the onset of cancer. There is a little-known endocrine organ in the human brain called the pineal gland. It has been confirmed by scientific research that one of the functions of 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, make the heart breathe, enhance human immune function, restore fatigue and even kill cancer cells. But one of the biggest characteristics of the pineal gland is that as soon as the eyeball sees the light source, melatonin will be inhibited and ordered to stop secreting.

People's eyelids partially block the light source. 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. However, once the light is turned on and the night is frequent, the secretion of melatonin will be more or less inhibited, thus indirectly affecting the human immune function.

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