Why can't you wash your hair before going to bed

After a busy day, we always want to have a good rest while online, so everyone will wash their hair before going to bed. However, some people have heard that washing hair at night is not good. This is because washing hair before going to bed at night can easily lead to the entry of cold air and bacteria. Therefore, even if you wash your hair at night, you must blow dry your hair.

Is it harmful to wash your hair at night?

People are in a hurry to go to work in the morning and have no time at noon, so it is most appropriate to wash their hair while taking a shower at night. Therefore, night has become the common time for most urban white-collar workers to wash their hair. Some people think that using a hair dryer will damage their hair, so they just blow-dry it briefly and leave it at that.

Of course, it would be best if you could give your hair enough time to dry thoroughly after washing it at night before going to bed. But sometimes I am too busy and wash my hair after 10 o'clock in the evening. After washing my hair, I am so tired that my eyelids are so heavy that I can't open them, so I fall asleep before my hair is dry.

It is taboo to sleep with wet hair after washing it at night, or to sleep with wet hair and the air conditioner on. When you wake up the next day, you often feel headache and fatigue. This is because during the day, a person’s yang energy is weakest at midnight, making them easily fatigued and less able to resist illness. Washing your hair before going to bed will cause moisture to remain in the scalp. Doing this in the long run will lead to qi stagnation, blood stasis, and meridian blockage. Moreover, if you sleep in an air-conditioned bedroom after washing your hair, with your head exposed to the cold air, the combination of cold and dampness will cause illness. Many people experience scalp numbness and pain in the middle of the night. If things go on like this for a long time, it can also cause a disease called subscalp venous plexus inflammation.

If you fall asleep with your hair wet, the body's temperature regulation center will have low regulation function and you will be more likely to catch a cold.

Therefore, generally speaking, it is best not to wash your hair before going to bed. If you want to wash it, dry it with a dry towel, and then use a hair dryer to blow dry your hair before going to bed. This way, you will not catch a cold.

The specific harm of washing your hair before going to bed

Induced facial paralysis

Many girls wash their hair at night without drying it, and their mouths become crooked when they wake up in the morning. Facial paralysis, scientifically known as facial nerve paralysis, is a common and frequently occurring disease that is not limited by age. The common symptoms are facial paralysis and eye deviation, and patients are often unable to complete even the most basic movements such as raising eyebrows, closing eyes, and puffing out lips. Why does washing your hair cause facial paralysis? Doctors believe that the facial nerves are most relaxed and have the lowest resistance when sleeping at night. If they are stimulated by the cold of wet hair, it can easily affect the facial nerves behind the ears, causing local spasms and inducing facial paralysis. It may not be so obvious in the summer when the weather is warm, but in the winter when the weather is cold, the chance of facial paralysis is very high.

Colds and flu

The human body's yang energy has its own laws of movement. Traditional Chinese medicine believes that human yang energy is weakest at midnight. After a day of exertion, women are easily physically and mentally exhausted, and their ability to resist cold is also reduced. Therefore, if you wash your hair with hot water before going to bed, the dilated capillaries will be stimulated by external factors, and the yang energy in the head will condense when it encounters cold, causing the body to suffer from cold. In addition, after washing your hair, a large amount of water will evaporate from your head, taking away a lot of heat from your body. If the immune system is low, heat dissipation will cause the capillaries in the upper respiratory tract to contract and reduce local blood flow. If the resistance of the upper respiratory tract is reduced, bacteria and viruses may take advantage of the opportunity to enter and cause upper respiratory tract infection and cold symptoms such as runny nose, nasal congestion, headache and even fever. Therefore, if you go to bed with your hair wet, you are more likely to catch a cold.