subject: To change the habit of shampooing at night [print this page] To change the habit of shampooing at night
Are more intense pace of modern life, work during the day, activities, entertainment and so overwhelmed, a rare free evening can comfortably wash tall. After shampooing at night, if sufficient time for the hair dry up went to bed, then of course be best. But sometimes too busy, and after 10 pm when the shampoo, then wash the head to the rolling into a heavy tired eyes, so the hair was dry on the fell asleep. To do so, the older generation will say will be a headache after the fact, through modern scientific research, it was found that not unreasonable. We must know that human metabolic process, always try to produce heat to maintain body temperature, the heat conduction also through the blood circulation to the body surface, by radiation, conduction, convection and evaporation, etc. Bleeding to the outside world constantly. Strong human body resistance, 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 reduced to the body temperature remained at around 37 . But people who are weak body resistance, the automatic adjustment of body temperature, making the body less able to maintain normal body temperature, so when the whole body or a local exposure to cold on the common cold. After we wash with hot water as warm effect to the scalp telangiectasia, radiation, heat around the body to increase, and because after shampooing hair is wet, there are large amounts of water evaporate out, also take away a lot of heat . Generally when one gram of water evaporating away 500 calories. As the heat increased, so that the body cold, so reflex contraction of capillaries to the upper respiratory tract and partial reduction of blood flow, upper airway resistance decreased, so that local already exist on the virus or bacteria take advantage of the growth and reproduction, resulting in the respiratory tract infections, which have flu symptoms such as runny nose, stuffy nose, headache or fever. If in the case of the hair is dry to sleep, then the central regulation of body temperature regulation dysfunction, the more susceptible to cold. Therefore, in general, best not to wash your hair before going to sleep, if you want to wash, dry towel to dry, then use the hair dryer to blow dry my hair before sleep, so not a cold. The case of dry hair not fall asleep, to be sick.
