i need help for solution of this case really?what is the best treatment with a case of 45 years old male patient with 1.5*2 cm large superfacial oral ulcers affecting unilateral buccal mucosa and lateral tongue surfaces with burrning pain with a history of recurrence every 3 months for 2 years peroid.The patient took topical and systemic steroids with out benefit, systemically he had drugs for colitis for the past 7months??