Hi, Iam 30 years old, I tend to catch cold very easily, this usualy happens with every change in season, even for any suden change in weather, dust, etc. Nasal congestion occurs, at times multiple sneezing. Is it allergic or weak imune system?? Should i take genric cold tablets such as Crocin Cold and Flu, or antiallergic such as Citrazine?? Or Asthakind Dx syrp?, will it be helpful??