Are U sexually active at all? burning while urinating usually come from a STD. The itching could be a yeast infection or maybe some type of fungus and Dr can swab you and give you a creme for that as well as an antibiotic for an STD if that is the case. Did you possibly scratch yourself while masterbating? I would not let it linger I think you need to see your Ob or go to local health Dept and have things checked