Oral lichen planus is getting more and more serious in five months, which can be treated by local medication to relieve pain and cure the erosion, including glucocorticoids and immunosuppressants, as follows. 1. Glucocorticosteroids: with strong non-specific anti-inflammatory and immunosuppressive effects, commonly used glucocorticosteroids include dexamethasone, trimethoprim, clobetasol, hydrocortisone, betamethasone and so on. The dosage forms are cream, gel, paste and so on. 2. Immunosuppressants: for those who are not sensitive to glucocorticoid treatment, including azathioprine, tacrolimus, cyclosporine and so on. All of the above drugs need to be used under the guidance of a doctor, and it is recommended to go to the hospital in time to receive professional treatment as early as possible.