If the hair drops out after staining, then this is the normal reaction of the hair to chemical attack. Most often this way, the hair reacts to illuminators (hydroperite, for example), cheap hair dyes or too frequent staining.
In the period of puberty in the human body can occur different phenomena, even hair loss, which, in principle, happens rarely. But, if it was suddenly noticed that the adolescent's hair falls out - this does not mean that the child is sick.
Alopecia has been haunting people for so long that its origins are lost in the fog of centuries. In our time, there are elegant and effective surgical methods of hair transplantation, and they, in fact, heal.
Focal scar scar tissue with irreversible hair loss, or pseudopelagus, is not a separate nosological form, but represents the final result of the evolution of a number of atrophying dermatoses of the scalp (acquired or congenital).
Daily hair loss (50-100) is a physiological process; The follicle re-enters the anagen phase and alopecia does not develop. However, under the influence of various external and internal factors, the asynchronous nature of the hair cycles in man is disturbed and excessive hair loss occurs.