Hi I Have Hair Thining,can See Scalp Is Visible.although I'm

Hi i have hair thining,can see scalp is visible.although i'm taking multivitamins like a,b,cd,e also iron tablets and biotin bt can't see my hairs growing back.please adivse me medicine and gel also minioxidil didn't suit me,i had more hair loss also had allery n skin became totally dry.