Rain helps you sleep due to factors such as low oxygen levels, the sound of rain helping to relax the body and the dimness of the weather.
1. Low oxygen content: In rainy days, the air humidity is high, the oxygen content in the air is lowered, and the sympathetic nerve excitability is lowered, so you will feel sleepy in rainy days.
2. The sound of rain helps to relax the body: The sound of rain is white noise. When sleeping, white noise creates a shielding effect. Relatively soothing and regular white noise will make people feel calm, thus ignoring the noisy environment and shielding many subtle and unconscious sound changes. Therefore, it helps to sleep when it rains.
3. Dark weather: Rain is always accompanied by cloudy skies. When the environment is dark, the pineal gland in the brain secretes a special hormone melatonin. Melatonin can shorten the time to fall asleep and improve the quality of sleep. When rainy days come, it is easy to sleep better than usual.
When you have long-term sleep problems, it is recommended that you seek medical attention.