I have many friends who are having skin allergy to the extent that it hampered their social life.  I have similar problems too, if i won’t be careful in what am eating then for sure i always have skin blisters and wounds.  One of my bosses in china is allergic to soy products.  He is vegetarian so he gets his protein  from soy beans then later he experienced the worst skin problems anyone could have.  I think he went to see a doctor and he was told that he needs eczema treatment as soon as possible that time to control and eventually stop the degradation of skin.  The last time we met, the scar was slowly healing and he totally avoids soy products.