 [ Symptoms ] i am really scared something is wrong with my kidneys [ Disease ] could be your son is allergic to the adhesives on the band aid it should go away in a couple of days if not wait wait go see the doctor <positive_smiley> i would check with the school and find out what kind of band aid so your doctor can have something to work with in hishers diagnosis not much you did not know but i hope your son feels better