Most often hair begin to fall out due to a violation of the cycles of their formation and growth. In these cases shifts the speed and duration of an active phase Anagen and hair follicle immediately moves into a phase of existing hair shaft rejection and loss Telogen/Exogen. The following are the main causes that promote this violation:
Different diets - lack of nutrients in the daily ration, especially the once responsible for hair development - copper, iron, zinc, biotin, fatty acids and vitamin C.
Dramatically started or prolonged starvation or starvation diet without prior preparation of the body - as the whole body is going through a kind of physiological shock and due to lack of nutrients.
Emotional stress - long-term stress, depression or stress can cause hair loss.
Physiological stress - post surgery, anesthesia, etc., have physical and emotional effects on the whole body and can trigger hair loss.
Bleeding - larger or prolonged blood loss not only impairs the general state of the body, but also significantly reduces the provision of hair follicles nutrients.
High fever - increased body temperature due to various diseases affects hair development.
Medication - use of some potent drugs, particularly in high doses and needless, can trigger hair loss.
Hormonal changes - during pregnancy and after childbirth, as well as disruption of the thyroid gland, diabetes, etc., can increase hair loss.
Genetic inheritance - in both man and woman can provoke hair loss and thinning.
Severe disease - infectious, chronic diseases alter the normal functioning of the body and the metabolism of hair follicles.
Malignant tumors and associated treatment triggers hair loss.
Toxic substances - thallium, arsenic, plumbum, etc. induce hair loss.
Radiation - ionized, X-rays, Gamma-rays, etc., provokes hair loss.
Chemicals - the misuse of chemical hair procedures or poor quality of these procedures can contribute to hair loss.
Forms of hair loss 
