Is there any kind of permanant solution for hay fever and sneezing a lot only in spring season. ?

Possible: Many people who have received allergy shots for at least 4 years can obtain prolonged remission following cessation of the shots but not all people can achieve the long term tolerance. If the symptoms are confined to the spring, you may consider trying a nasal steroid/antihistamine nasal spray to see if it works better. Personally, I see little problem in doubling up on Nasonex (mometasone) in spring.