Hair Loss May Indicate Lack of Enough Sleep

     Currently, the exact cause of  hair loss is unknown. There are many theories about it. The most common one associate it with the male hormone called testororone. Some of them attribute it to poor blood supply to  skin on which the hair is grown. In this article, I will present another common but easy neglected cause for hair loss, lack of sleep.
    You may ask why lack of sleep cause hair? To better understand this, we first need to know there are two system that control basic status of body activities. One is called sympathetic nervous system, which is active in the day. the other one is called parasympathetic nervous systems, which is active at night (at sleep). The function of sympathetic nervous system is to participate body's reaction to adverse reaction such as fight. Parasympathetic nervous system take control when body is at sleep.  Both of the two system are out of our human voluntary control.The blood vessel of the scalp on which the hair is grown will contract when sympathetic system is active and relax when parasympathetic system is active (such as sleep). So if somebody can get enough sleep, he will definitely will get  good blood supply to the scalp and health hair. On the contrary, people with less sleep or lack of sleep will get more hair loss than it should.
   So avoid hair loss, here is some advice for those people who suffer from amnesia.
1. Establish good sleep habit. for example, go to bed early and go up early.
2. Participate more exercise
3. Take enough high vitamin containing food
4. Avoid deep night working such as reading and
5. Avoid  take a lot of water during night
6. Avoid take hot food at night.