Sir I Have Been Having Problem Of Cradle Cap For

Sir I have been having problem of cradle cap for last 5 years. Nowadays I have lost major part of hair on my head. I have tried every possible thing n medical treatment but in vain. My age is now 29. Will u help me n guide me how to come out of this problem n grow back my hair?
Regards,
Ankush kumar
29 yrs old Male
India