The cause for Psoriasis
seems to be the triggering of an autoimmune-response against proteins produced by immune cells in the skin, following a bacterial infection/ invasion (beta-defensins). This means that the disease that follows after a triggering event, has become independent on the presence of pathogens.
I think EC is different with this respect, because it seems to require a constant skin irritation/ presence of substances that trigger the inflammation in our lips. Once this cause has been effectively removed, the condition improves (at least from what I can derive from stories on this forum).
There is also an important difference with respect to the symptoms:
Psoriatic skin usually feel very smooth/ sometimes with small white scales, while EC generates thick crusts that peel off.
Two common cures for Psoriasis
A) taking of salt baths (anyone with EC ever try this?)
B) usage of hydrocortisone, a substance that kills immune cells (T-cells). I tried the latter therapy and it didn't work for me, not any improvement.
oftenly spread across certain parts of the body, while EC for the most of us does not.
There are probably a lot other differences, but my point is that EC is significantly different from psoriasis, and should be treated in a different way.