vitiated sleshma/kapha along with rakta will cover and cause obstruction to flow of nutrients to the hair root

hair is a byproduct of

bone formation and the tissue responsible for building bones is also responsible for the growth of hair. Early hair loss is related to body type and the balance of the mind-body constitution (doshas). People who have excess Pitta in their body are likely to lose their hair early in life. Excess Pitta in the sebaceous gland