hi..Thanks for the query you have not explained how the rash looks .There can be several possibilities. From the site and the kind of symptoms you mention, I would think about the possibility of a ringworm infection. Called tinea corporis,it is a superficial dermatophyte infection characterized by either inflammatory or noninflammatory lesions on the skin.A pruritic, slowly spreading annular plaque is characteristic of a symptomatic infection. Patients occasionally can experience a burning sensation.A potassium hydroxide (KOH) examination of skin scrapings may be diagnostic in tinea corporis. Topical therapy is recommended for a localized infection. topical creams having anti fungal components,eg, ketoconazole/ clotrimazole/ miconazole should be applied to the lesion and at least 2 cm beyond this area once or twice a day for at least 2 weeks. Hope this helps..take care!