Hi, Thanks for asking the query, According to your clinical symptoms i suspect that you have developed apthous ulceration this can be due to allergy to some food products, nutritional deficiencies, hormonal imbalance. I would suggest you to apply cortisone acetate cream topically over the affected area. Take lukewarm saline gargles to give soothing effect. Start with multivitamin suplements. Maintain a good oral hygiene, take antiseptic mouthwash rinses twice daily. Hope this helps out. Regards...