hello docter, my son is having allergic problem but it is not know exactly what allergy he has every month he suffers from cold,and chest,nose congestion .doc says he has astma.we have seen many docters and followed there advice,but still he is suffering from this problem.he is having this problem since 3/5 yr,now he is 5.5 years old.i have observed that some food(gam, curd ,apple,orange and sweets) and some time changing weather condition triggers this allergy.i dont know weather i m correct or not.doc says give him all food.he snezzies too much when he gets cold.