When I had my embolisation, my interventional radiologist advised me, “I’m planning to reduce your stroke risk. I can’t say that I’ll do anything about headaches”. And that was the point: getting your AVM treated is focussed on the risk of rupture and what might be done to reduce that. The brain is far too complex a thing to set out to fix headaches. Any neurosurgeon who promises to sort out headaches is probably fibbing.
Very best wishes,