Lichen planus is a chronic condition that takes time to resolve. The medication given to you seems appropriate. Please follow your doctor's advice.
Since lichen planus is an immune reaction, there is no permanent cure. The condition can increase and decrease over time. But with medication, it can be under control.
Only a small percentage of lichen planus turn into cancer. If you have red areas or ulcers in the mouth, Pl meet an oral medicine specialist.
Next Steps
In addition to the medicine, you can use Garbenz oral rinse before food to relieve burning sensation.
Make sure you are relaxed, as stress exacerbates lichen planus.