They are related....Diabetes and Psoriasis. They are both the result of fungus!
Read The Fungus Link by Doug Kaufman, watch his show or website...KnowTheCause.com.
I had Psoriasis for over 30years. It improved significantly in ten days and all was gone in 3 months. Many disorders including Type 2 Diabetes are caused by Fungus.
Simple diet plan plus a few nutritional. HIs books will explain how to proceed.