thank you for your query.hyperkeratosis
of the tongue is due to frictio between the tongue and other dental structures.
protocol for treatment indicates-
1.Biting, sucking, or chewing habits should be discontinued, and fractured or rough tooth surfaces or irregularly fitting dentures or other appliances should be corrected.
2.Observe and monitor the patient to be certain that the frictional area is resolving in a timely fashion. In general, the patient should be reevaluated in 2-3 weeks for signs of lesion regression or resolution.
3.In the absence of resolution, even when the cause has been eliminated, a biopsy
specimen of the tissue should be taken to confirm that no dysplastic or neoplastic change is present.
if nothing works then proceed to surgery.
wishing you good health