Increased brittleness and hair loss is not only a cosmetic defect, but also a sign of certain disorders in the body. The problem can be connected with diseases of internal organs, deficiency of useful substances, chronic pathologies.
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.