I am a guy with long hairs (till my shoulders) some times my head gets itchy. What should i do, sometimes Selsun shampoo helps and sometimes not. When i use tenovate-M with water on my head, it helps a lot but its difficult to apply. As soon as i stop using it, itching starts again after some days. What is the problem ? And can i have a shampoo that can help and has something like tenovate-M in it.