Christine
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        Hi.  I am a 27 year old and I have had psorasis is I was 7.  I don't know about diabetics, but for me the only thing that seems to work is Methotrxate.  I can't take antibiotics, I'm allergic to them. I hope this helps you.  I know what It's like to be completely covered.  It's miserable and embarrassing.  It's nice to know that there's people out there that I can relate to. Good luck.