Hello These symptoms may be due to these reasons , these include. 1 Allergic rhinitis , nasal itching , watery rhinorrhea, conjuctival symptoms, eye pruritus, sneezing, post nasal drainage . Other sign & symptoms are headache , nasal obstruction , impaired smell morning cough . All these symptoms are a characteristic feature of allergic rhinitis. I want to tell you that allergic rhinitis is a precursor of asthmatic allergic bronchitis or asthma. Avoidance of , dust , mites , pests ( cockroaches ) pollen , molds , sudden rise and fall of temperature , fine dusting powder . These are predisposing factors of asthma as well as allergic rhinitis . When such patient visit my clinic I prescribe them to take monteleukast+ fexofenadine combination tablet once or twice in day. Steam inhalation also help . 2 As I mentioned above this ( as you are a chronic patient of these symptoms from last 15 years , so may turn into asthma . Wheezing , cough , shortness of breath, whistling sound are characteristic feature of asthma . When such patient visit I advise them to take monteleukast + bambuterole once or twice in day . Beside avoidance is important . 3 Bronchiectasis is another such cause because you are passing plenty of mucus through nose . So get in sputum examination as well Xray chest for confirmation. Deal as above mentioned , this will help you.