Hi hair fall at this age is mostly due to a condition called Telogen effluvium in which more percentage of hair enters into shedding stage. To know the exact cause of hair fall and for scalp examination you need to consult a dermatologist. Start taking Tab H- vit forte once a day at least for 3 months along with calcium and iron supplements. It will help in pdividing adequate nutrition required for hair roots. Many effective anti hair fall treatments are available now like mesotherapy and PRP for which you need to consult a dermatologist