Brenda Thornton
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        Cracking can be due to a fungal infection and can be quite painful.    Lupus also presents with skin problems.  See a dermatologist or your rheumatologist and insist that they examine and test the skin to see just what the problem is.    I have fibromyalgia and psorriasis and I was treated over and over for what the doctors and I thought was a fungal infection till finally a rheumatologist did a skin scraping and told me that the foot skin thickening and toenail problem was from the psorriasis!!!