It is likely that you are exposed to an allergen in the environment which is causing the running nose and the cough. You will require antihistamines to get it under control at present. Kindly visit an ENT doctor to be evaluated and undergo further investigations to find the underlying cause of the problem and have it treated at the earliest. These steps may help: - Do steam inhalation(plain steam) regularly - Drink water at an average of 3 liters per day - Avoid caffeinated and alcoholic beverages as they cause dehydration and will worsen your condition. - Have spicy food once in a while which will help clear your sinuses - Use a humidifier in your room which is seen to be beneficial in sinusitis - Wiping the face regularly with a towel moist with hot water has also shown to help.