There is no specific reason for hair loss. A common reason is heredity or genes from parents. male and female hair loss pattern is different and so the causes are. Some other common reasons can be hormonal imbalance, illness, medications, lifestyle, deficiency of vitamins, etc. No doubt, Stress is the major reason for hair loss in these modern days. Applying chemical relaxers and hair colors may worsen the hair problems. Clogged pores, lack of blood flow, clogged pores & excessive shampooing may also affect hair growth. Only hair Specialists may examine the Scalp and provide the best solutions to cure hair fall.