(en) [What's red is not always allergy: Autoimmune diseases with an erythematosus component] Allergists as well as dermatologists should be capable of recognizing autoimmune skin diseases, in particular various forms of lupus erythematosus and dermatomyositis, since the clinical signs of these diseases can easily be confused with those of allergic skin diseases. Not recognizing these potentially lethal diseases, which require an accurate diagnosis, may result in failure to initiate appropriate therapy. Mistaking them for an allergic condition would be especially harmful for the affected patient.
Tennstedt, D. (2012). Tout ce qui est rouge n’est pas de l’allergie : les maladies auto-immunes à composante érythémateuse. Revue Française d’Allergologie, 52(8), 521-523. https://doi.org/10.1016/j.reval.2012.03.004 (Original work published 2012)