I have been taking Dithiazide tablets (diuretics) for a few months and recently, in the last three months or so I have been coming out in tiny red spots, raised like pimples on my arms, shoulders, back, not all at once but sparsely, here and there in different places and are very itchy. I think it is the sulphur in this tablets that may be causing it as I do not take any medications with sulphur.