What could be the possible reason for this?

I have a headache that hasn't gone away for a few years, and it's gotten worse lately. The pain also occurs behind my eye. I'm having trouble standing, no painkillers are working. In addition, I feel like flies are flying in front of my eyes, my ears are ringing, there is a buzzing in my head, as if a plane is flying. I don't expect you to make a diagnosis from here, but what could be the possible reasons?

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DeWayfarer · 61-69, M

Could be many things, tumor is probably the worst. But bad teeth can do something similar if they are bad enough. I mean really bad! Both can kill you.

See a doctor!