im having itchy pimple only on some part of the body, for five weeks,ive taken permetrine cream and repeat after seven days, pregnisolone tablets for five days , hydrocortisone,, piriton ,four tabs four times a day, cetrezine , all is not helping .the pimple dry out after some times and new ones appear,even my head becomes itchy at times.im very clean and and have good hygiene,