Still waiting on biopsy results for Vasculitis, compression socks help clear legs and feet what could be the cause of the Vasculitis?

See details. The are numerous causes for a vasculitis whether it effects just the skin or multiple organs. Please see a rheumatologist if the biopsy confirms a diagnosis of vasculitis. If it is vasculitis compression socks will not cause it to improve.
Need more data. There are many causes of vasculitis. It can be viral, it can be disease associated, autoimmune. Much depends upon you entire workup, your laboratory data including your clinical findings, imaging, etc.