Hi,  you can try immunotherapy,  but it's a long period treatment lasting up-to 5 yrs.  Allergens are identified based on skin prick test and once identified, sub lingual tablets are to be taken.

Hi you are having allergic rhinitis. Avoidance of exposure is the only way to get permanent relief.. Allergy is a body defence mechanism to prevent the entry of foreign objects into the body. A strong reaction leads to allergy. The medicines we use reduces that response. So since we cannot stop the bodyguard of the body, avoiding the stimulus is the only permanent solution. There are some surgeries which reduce the watering from the nose etc. But they will not be able to curb the response.