Hi, I understand your concern. The terrible rash under your breasts and stomach folds which is not responding to vision, could be due to primary fungal infection complicated with bacterial infection (secondary to scratching). A photo of the affected area is required to evaluate the changes myself. As it is involving your genitals, I advise you to consult with dermatologist. Meanwhile, I advise to: - keep the area well clean and dry - apply Gentian violet solution locally; let dry - then apply vusion (to me must change to terbinafin) morning, and fusidic acid cream at night. - hydrocortisone cream should apply alone or mixed with fusidic acid cream Hope this helps.