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Fatigue! Fatigue is the worst and it occurs at all the wrong times, often for no reason. No energy to get up to do anything.
After that, I would put muscle spasms. These are frequent and very painful, also occurring at the MOST inopportune moments. Some of these actually morph into migraines, also a bad problem.
I have MPA, so right now, those are mine. Other forms of vasculitis have other symptoms, such as crusting/bleeding nose, constant dry cough, eye problems, rashes with itching, and so on.