Last night all of sudden my 7 year old son started itching, red rashes and mosquetoes bubbles kind of appeared at behind neck,behind  ear, stomach, under arms, back he start crying and start skraching himself . I sponge him , change his clothes, apply propysalic ointment all over effected area, make him sleep, but as he wakeup in morning today again he started strach himself . Now i dont find any rashes or redness at stomach , back but now lower abdomen area is badly affected , behind knee joint , ankle joint having rashes and big bubbless ...