<s>[INST] Hi. Ever since I was about 8 years old I ve had a chronic cough. I was diagnosed with nonallergic asthma at 10 years old, but stopped having asthma attacks when I went into high school two years later and no longer had to run laps in PE. Today I m 21 and I still cough, but only in cold and/or humid weather. I m fine on dry summer days, even wet summer days as long as the temperature doesn t dip, but as soon as it gets cold or cold and wet, the cougChatDoctores back. Everything I find seems to say humidity prevents cough, not causes it. Help? [/INST] Hi, actually in your case cold weather and even changing season IC causing the symptoms, in sudden change of weather our body is not able to produce adequate amount of antibodies to combat bacteria and viruses and thus get infected, also in some weather pollen grains remain suspended in air which causes allergic symptoms. For its prevention you should avoid exposure to cold, should do regular gargling with glycoseptol syrup in lukewarm water, should avoid sweet dishes and ice creams specially in changing weather conditions. Can take levocetrizine in the initial stage if required, and you should go for panel test for allergy also. Wish you all the best. </s>