<s>[INST] context: Refer Robbins page no 728 9/e Chronic recurrent oral aphthous ulcers are the most common type of inflammatory efflorescence of the oral mucosa, with a prevalence of 2% to 10% in Caucasian populations. To treat them properly, physicians should know their clinical appearance and course, conditioning factors, underlying causes, and differential diagnosis. Results Hard, acidic, and salty foods and toothpastes containing sodium lauryl sulfate should be avoided, along with alcohol and carbonated drinks. In Germany, the only drugs that have been approved to treat oral aphthous ulcers are coicosteroids, topical antiseptic/anti-inflammatory agents such as triclosan and diclofenac, and local anesthetics such as lidocaine. Antiseptic agents and local anesthetics should be tried first; if these are ineffective, topical coicosteroids should be used. In severe cases, local measures can be combined with systemic drugs, e.g., colchicine, pentoxifylline, or prednisolone. The efficacy of systemic treatment is debated. Other immunosuppressive agents should be given systemically only for refractory or paicularly severe oral aphthous ulcers due to Adamantiades-Behcet disease [/INST] question: Apthous ulcers are also known as | options: A: Canker sores B: Marjolins ulcer C: Curling s ulcer D: Cushings ulcer | answer: A </s>