Hello Lybrate user, I can infer from your comment that you have wound probably a ulcer
in your tongue, which causes pain
and is present since one year. Any ulceration in our mouth (be it in cheek, lips or tongue) if not spontaneously healed within a month tested by biopsy. For pain you can get any topical anesthetic agent in any medicine shop. I would recommend you to find an oral pathologist
(specialist for diagnosing and treating such cases) and give him a visit as soon as possible.