复发性口疮和扁平苔藓是口腔粘膜病中最常见的疾病。前者是指口腔粘膜反复发作的,圆形或椭圆形溃疡,伴剧烈疼痛,轻者间歇发生,数月一次,重者连续不断,持续较长时间。后者表现为口腔粘膜白色花纹,经常伴有粘膜充血及糜烂,病人往往也感到疼痛。这二种疾病往往给病人造成精神痛苦, Recurrent aphthous and lichen planus are the most common diseases of oral mucosal disease. The former refers to the recurrent oral mucosa, round or oval ulcers, with severe pain, light intermittent, once in a few months, severe cases of continuous, sustained a long time. The latter manifested as white pattern of oral mucosa, often accompanied by mucosal congestion and erosion, the patient often feel pain. These two diseases often cause mental distress to patients,