Steroid (cortisone) gels, pastes (such as Kenalog in Orabase) and creams can be helpful for the mouth and genital ulcers. Colchicine can also minimize recurrent ulcerations. Mouth and genital ulcers healed and were reported at a national meeting of the American College of Rheumatology as less frequent in 9 or 12 patients who were treated with Trental ( Pentoxifylline ). Trental also seemed to maintain the healed ulcers for up to the 29 months of the study. The effectiveness of Trental, the researchers said, seemed to be enhanced by the combination with colchicine in some patients.