There are two reasons: The live hair germ centers have either been permanently destroyed or they have been temporarily damaged.
Alopecia (permanent baldness) affects 40% of men, it affects only the crown of head in women.
Three factors of Baldness: Heredity, There is no cure, Injuries and diseases – the hair germ centres by chemicals. High Fever – Thyroid or tuberculosis disease often occurs temporarily hair loss but it grows again.
Drugs, X-rays, Malnutrition and some skin diseases also causer temporary loss of hair.
Alopecia Areata a disease- the hair falls out in patches all over the head.
Baldness can affect anytime of life. India Yoga Master believes that if you rub your nails of fingers every day only five minutes regularly a year that might cause you to grow your hair and it helps to recover original color of hair.