It has been reported that some patients have been misdiagnosed with Bullous Lupus, when in fact the correct diagnosis in their specific case was Dermatitis Herpetiformis.
Dermatitis herpetiformis is an autoimmune skin rash that occurs in people with celiac disease when they eat gluten. It causes bumpy, itchy skin that has blisters, fluid filled sores, sores that look like hives and can be raised. These bumps show up on your elbows, knees, scalp, butt, back and shoulder blades. It can be misdiagnosed as linear immunoglobulin A bullous dermatosis, bullous pemphigoid, bullous lupus, urticaria, atopic dermatitis, contact dermatitis, arthropods bites and scabies.