As we all know, the rhythm of recent life is so intense. Individuals are busy with their work, actions and leisure throughout the day. Due to this fact they like washing hair within the night when they’re free.
In fact, it’s OK if in case you have sufficient time for the hair drying out while you wash hair within the night. However typically you might be too busy to scrub hair earlier than 10 pm, and you’re feeling so drained after washing that you simply at all times go straight to mattress and sleep earlier than the hair is completely dry. To take action, the elders will say that can trigger headache later. The truth is, their phrases are considerably cheap by means of trendy scientific analysis.
We should know that the human physique at all times produce warmth repeatedly within the metabolism course of to take care of the physique temperature. And the warmth could be transferred to floor layer of organism by means of blood circulation and emanated to the surface with methods of radiation, conduction, convection in addition to evaporation.
For these with sturdy physique resistance and regular regulating operate, the 2 processes of heating and cooling are in stability, that’s to say warmth will improve when the physique temperature declines, which make the physique temperature stay at round 37 C. However for individuals who have weak physique resistance and poor regulating operate of physique temperature, they’re straightforward to get chilly by entire or native publicity to chilly.
After we wash hair with heat water, the capillaries of the scalp will dilate as a consequence of heat impact and the warmth of the physique radiating round will improve. In the meantime, the moist hair will trigger a variety of water to evaporate, which take away a lot warmth. Usually talking, 500 energy might be taken away when one gram of water evaporates.
As the warmth loss will increase and the physique will get chilly, the capillaries of the higher respiratory tract shrink reflectively, partial blood circulation quantity reduces and the resistance of the higher respiratory tract decreases, which result in that existed virus or micro organism get an opportunity to step in, develop and reproduce. It’ll outcome within the respiratory tract infections, which make folks have flu signs similar to runny nostril, stuffy nostril, headache or fever.
So usually talking, it is best to keep away from washing hair earlier than going to mattress. Even when you had to do this, it is best to towel your hair dry. On this means you’ll not catch chilly.