Hi I M Mehwish...my Age Is 21 And I M

hi i m Mehwish...my age is 21 and i m having hairfall n my hairs are already too thin..plz guide me...my hairs are becoming too scatteredly on scalp that skin of scalp strted becoming prominent...should i strt taking surbex-z and will u recommend me diet in this respect....i m a medical student n i think tension will play major role in the coming years in hair problem...