Women at Xi Toufa more harm

After shampooing at night, if enough time to dry the hair of the Cai Shui, then of course the better. But sometimes too busy, and have a night when 10 shampoo, then wash the head into a heavy tired eyes could not open, so the hair was dry on the engaged reverse gear and sleep.

Doing so, the older generation will say that the future will be a headache, but in fact, through modern scientific research, people find it not unreasonable.

　　Thermoregulation and the

We must understand that human metabolic process constantly generates heat to maintain body temperature, they also heat conduction through the blood circulation to the body surface, by radiation, conduction, convection, and evaporation, etc. continue to diffuse to the outside world.



Resistance of the people in the body, body temperature control mechanism may be normal, by regulation, heat and cooling the two processes are balanced, that is, when the body temperature tend to decrease, then increase heat production, heat reduction, so that the body temperature remained at about 37 ℃ .

But for people with weak body resistance, which automatically adjust temperature, so that the body less able to maintain normal body temperature, so when the body or a partial catch cold on a cold easily.

We wash your hair with hot water, due to thermal effects, so that the scalp telangiectasia, body heat to the surrounding radiation increased, and because after shampooing the hair is wet, there are a large number of water evaporation out, but also take away a lot of heat . Generally when one gram of water evaporating away 500 calories. As the heat increased, the cold body, and thus to make the upper airway reflex to shrink capillaries and partial reduction of blood flow, reduced resistance to upper respiratory tract, it makes the local pre-existing viruses or bacteria take advantage of growth and reproduction, resulting in the respiratory tract infections, resulting in flu symptoms such as runny nose, stuffy nose, headache or fever.

And if the hair is not the case of dry fall asleep, this time the regulation of body temperature regulation function of the lower center on the more susceptible to cold.

Therefore, in general, before going to sleep better not to wash your hair, if you want to wash, you dry with a dry towel, and then re-use the hair dryer hairdryer before sleep, so not a cold. The case of the hair was dry fall asleep easily cold