Hair fall/hair loss or Alopecia is loss of hair from the head or body. It is very common to lose some hair every day. Generally when hair falls out, new hairs start growing in the same place of the old ones. But when someone has hair loss, their hair doesn’t grow back.
Stress, including physical stress from surgery, illness, or high fever
Medications like birth control pills, antidepressants, chemotherapy, etc.
Damage to your hair from pulling it back too tightly, wearing tight braids or ponytails, or using curling irons or dyes.
Age - You grow less hair as you get older. Hair also gets thinner and tends to break more easily as you age.
Poor diet, especially not getting enough protein or iron.
Thyroid diseases, such as hypothyroidism and hyperthyroidism