Oral lichen planus is difficult to be cured completely, but the symptoms can be relieved by active treatment. Oral lichen planus is a chronic inflammatory disease of the oral mucosa, the pathogenesis of which is not clear, and may be related to immunity, genetics, endocrine and other factors. Typical clinical manifestations are white streaks of damage to the oral mucosa, accompanied by mucosal roughness and burning sensation. The disease has a long course, sometimes relieved and sometimes aggravated, and is difficult to be completely cured. However, the use of standardized medication under the guidance of a doctor can alleviate the symptoms, such as the use of dexamethasone, prednisone and other glucocorticosteroids. Oral lichen planus has a certain chance of becoming cancerous if it does not heal, so regular checkups are needed during and after treatment to minimize the risk of cancerous changes.