Suggest Treatment For Dandruff

Hi, may I answer your health queries right now ? Please type your query here...                                                              i had dandruff from almost 7 years,i tried many types of shampoos from head and shoulders to selsun but it did not solve the problem.from past 3 years my hair started falling and now things have become worst.i also tried herbal treatment but it did not do much help.right now lot of hair has come out from the sides.
Please help