At night, the hormone secretion in the body is the most vigorous, and melanocyte stimulating hormone can make the body secrete more melanin. After sleeping, because the hair is still wet and cold, it is difficult to secrete melanin. Over time, hair will turn white.
Second, it causes headaches.
Because the moisture in the scalp has been evaporating and constantly taking away the heat in the brain, cold air can easily invade your scalp, which will naturally lead to headaches.
Third, cause a cold.
The water vapor in the hair cools the head, and it also affects other parts of the body, resulting in a decrease in local resistance, which in turn leads to bacterial infection and a cold.
Fourth, pollute the pillow.
Wet hair will naturally let moisture penetrate into the pillow towel and pillow core. Over time, the pillow towel and pillow core will not only turn yellow, but also become moldy.
Extended data:
Sleeping without blow-drying your hair is not good for your health, so you should wash your hair early so that you can have enough time to blow-dry your hair. It is best not to wash before going to bed (especially in autumn and winter). If you really need to wash, remember to blow dry your hair with a hair dryer, or dry it with a dry towel, and then wrap it with the same dry towel before going to bed.
In addition, pay attention to the use of hair dryer. Before using the hair dryer, use a towel, dry hair cap, etc. Absorb as much water as possible from the hair by pressing. Dry hair is also to better protect the hair, because the hair scales are open and easy to be damaged when wet, so it is necessary to absorb water as soon as possible and let the hair scales close.
The more water you absorb when drying your hair, the easier it is to dry it, which shortens the drying time and reduces the damage to your hair. Try to choose cold air to blow your hair, because too high a temperature will lead to dry, dull, split or even broken hair, and cold air is relatively harmless. Of course, air drying is the best choice.
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