Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Oral lichen planus ?
    ### Response:
    Oral lichen planus is a inflammatory condition that affects the inside of the mouth.  Signs and symptoms include patches of fine white lines and dots most commonly in the inside of the cheeks, gums, and/or tongue. Most people with lichen planus experience no to few symptoms, others may have painful sores or ulcers in the mouth.
    