My son is 4 year old he has allergic cough from past 3 month now doctor has advised one montral kid for 2 month, but now from 3 days he had sneezing with mucus and now he has started coughing. It is normal for kids to cough after cold and sneezing reduce or is it because of allergy that increases during cold . pls doctor can u guide and give and me appropriate suggestions because I'm very much worried.