I have eczema and angular chelitis as well. Although my allergy tests came back negative for everything I know my skin problems are caused by what I eat. What I've learned is that certain foods can still have a negative effect on the body even though you may not be "allergic" to them. I've been doing food elimination diets for the past couple years to determine the causes and now I cut out gluten dairy milk eggs vinegar (and anything with vinegar in it like mustard) and citrus fruits (anything too acidic). It's a lot to eliminate but my skin looks amazing now... and when I have cheats here and there my problems come back. These foods are just not worth it to me. Hope this helps.