 [ Symptoms ] is there an ingredient in sudafed that is similar to an ingredient in bactrim that could cause an allergic reaction  is there an ingredient in behind the counter sudafed that is similar to an ingredient in prescription bactrim that could cause an allergic reaction like hives after ingestion over time [ Disease ] hi you son is fine there is no reason to worry i think he is stressed or depressed for some reason does he have friends i think it is a social psychology problems if you think it is not psychological then only tests can be done are tsh t4 magnesium levels test good luck