Is this Lupus or an Epidermolysis bullosa acquisita (EBA) issue?

[Tiras]

Not sure if this is from Lupus or Epidermolysis bullosa acquisita (EBA) either way it’s an autoimmune disease. This place came up next to a scar from a blister from a year or two ago. It is just below waist, just above right leg. This adds to other blisters on feet and hands that is going on.

At any rate, it looks like I’m in the middle of a flare, just don’t know which one?