Traditional Culture Encyclopedia - Hotel reservation - How about washing and blowing your hair at night?
How about washing and blowing your hair at night?
After washing your hair with hot water, the scalp capillaries expand due to the warming effect, and the heat radiated by the body to the surrounding area increases. At the same time, because the hair is wet after washing, a lot of water evaporates and takes away a lot of heat.
Generally, one gram of water evaporates and takes away 500 calories. Due to the increase of heat dissipation, the body is frozen, which reflexively constricts the capillaries of the upper respiratory tract, reduces the local blood flow and the resistance of the upper respiratory tract, so that the locally existing viruses or bacteria take advantage of it to grow and multiply, causing upper respiratory tract infection, thus causing cold symptoms such as runny nose, stuffy nose, headache and even fever.
And if the hair falls asleep before drying, the regulation function of the thermoregulation center is low at this time, and it is easier to catch a cold.
2. Sleeping wet at night may cause headaches and other injuries.
It is harmful for people to sleep with wet hair at night. Sleeping with wet hair and air conditioning on, the human body is in a relaxed state, with slow metabolism, easy fatigue, decreased resistance and easy to catch a cold. When you wake up the next day, you often feel headache and fatigue. It even leads to headache, abdominal pain, diarrhea, indigestion and joint discomfort.
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