Hello. Thank you for writing to us You have a condition known as stomatitis/ inflammation of oral and/ or labial mucosa. Since you have already tried everything almost everything OTC, therefore, as a treating doctor I would suggest you to use a moderately potent topical steroid e.g fluticasone propionate 0.05% cream, twice daily for a few days. Steroids are anti-inflammatory and would help with the inflammation and discomfort with it. Though topical steroids are prescription drugs but you may try and check if its available OTC at a drug store near you. Thereafter you may use a lip balm for maintenance. I would also suggest adding a B- complex vitamin, once daily for a few days (2-4 weeks). Regards