My son is 16 years old. In childhood he was suffering from childhood asthma from 8 years of age to 12 years he takes inhaler asthalin thereafter till 16 he doesn't take inhaler but nodays he continue suffering from cold n sneezing few. Whether allergy test is useful to him or suggest which type of test is beneficial to find out exact reason. Earlier no test has been done, Dr. give him inhaler on his symptom. Thanx.