Best treatment would be Avoiding common irritants such as cigarette smoke and sudden temperature changes....you can consult nearest allergy clinic for skin prick test...immunotherapy might be helpful to you. Drink plenty of water. Use a humidifier. Try nasal saline sprays or rinses. If the runny nose is a persistent, watery discharge, particularly if accompanied by sneezing and itchy or watery eyes, your symptoms may be allergy-related and an over-the-counter antihistamine may help...try nearest allergy clinic for further help.