Hi and welcomte to HCM.
It seems like inflammation and it should be treated by antibiotics. It can be very serious sometimes and lead to serious intracranial infections.Also it can irritate nerves around it and cause neuropathic pain
. It can be surgically removed and I suggest to do it if this cause such symptoms. SO conuslt maxilofacial surgeon about this. It is hard that this is cancer but it usually slowly grow.Wish you good health.