Original
Daily; inescapable pain all the time at a base level which rises with triggers such as smells, sounds, stressors, exercise, blood pressure, heart rate, fatgiue.
Monthly; horrendous cluster headaches which include blindness, further pain, vomiting, memory loss. Results in hospital stays.
Occasionally; bleeds from the AVM, life changing consequences
Eventually; death, condition is likely to cause death, the risk of this increases over time.