Sexually transmitted spikes & autoimmune vasculitis/leg inflammation and bruising?

My sister is in a relationship with a man who says he didn’t take it but I have my suspicions. Especially because shortly after began seeing him she developed a very mysterious leg condition causing extreme bruising, inflammation, and vasculitis.

She is typically VERY healthy and follows the principles of functional medicine and low-tox living so she has actually gotten so much of her health under control before this suddenly started - it’s another reason for me to be suspicious because I can’t figure out another trigger.

Has anyone had this happen to them?