Hair roots are located in subcutaneous skin layer must continuously receive a designted amount of nutrients from the inside. In order for this to occur on a permanent basis our body must be healthy and fully functionable. Meanwhile our days an intense pace of life and work with a general reduction of movement activity in the background may contribute to all kinds of various diseases that are directly related to the nervous tension. The sudden increase in hair loss may appear for a number of reasons: due to the disruption of the endocrine system, metabolism, hormonal balance, as well as in connection with pregnancy, skin disorders and infectious diseases; body intoxication caused by disfunction of excretory system or due to excess medication with intensive treatment of diseases; depleted nervous system, severe stress or shock, exhaustion, irrational nutrition; lack of fresh air, sleep and rest, etc. Many other causes can trigger and strengthen the hair loss. Natural hair loss, when 20 to 100 hairs fall out on a daily baisi or spring and fall hair loss increase have nothing to do with balding and thinning, as new hair will be gradually replacing the ones that fell out. In case of progressing baldness hair loss increases due to the fact that new hair is not forming instead of old ones and do not grow out at all, while if they grow, they are so weak that fall out much faster than supposed to. Unexpectedly started strong hair loss may be due to the weakeness of the immune system or some disease, but also might occur as a result of prolonged stress and nervous tension. Nervous system directly affects our blood circulation, so at the time of stress our skin and, accordingly, hair blood supply is being reduced. With increased hair loss it is not recommended to perm and colour hair, on the contrary you have to treat your hair gently and carefully in particular. Increased hair loss and even eventual balding may begin due to prolonged mechanical impact, especially if the hair on the top and the back of the head are being repeatedly and strongly tied into pony tail or other hairstyle. In this case hair can grow back in again, but they usually grow much weaker than used to be. In general we can say that the reasons for hair to fall out, thin, change their shaft structure and other violations of hair growth consist of two main groups. The first group includes all the reasons associated with the general state of health or internal factors, while the second group includes all causes due to a variety of outside influence or external factors.