My son woke up this morning with itching and tingling in his hand and feet but went off to university anyway...by the time he returned from school at 3:00 there was swelling and welts on different areas of his feet...big toe on one foot , pads on another...swollen itchy painful....on some of his fingers an the tip of his right ear...went to emerg, they took blood and basically told him to go home and come back if it gets worse...he is six days in on an acne medication which he has taken before with no adverse reaction but emerg doc says stop taking it....we ve been home about 3 or four hours and he now has little tiny bumps appearing here and there, some clusters and some singles....Ny clarity will be greatly appreciated, thanks!