my child is four years and eight month old. He is frequently suffering from cold and cough for the last two years, In August, 2012 he has to be hospitalised for Pneummonia. Since then he is given inhaler every now and then. He is also on medication for hypothyridism since he was one month old. We have tried all sorts of treatment, like allopathy , homeopathy and Ayurveda , but his cold and cough is persisting. Today, we saw bloodstain with mucus from his nose. Is it serious. Please suggest treatment.