It is not easy. Not many doctors are knowledgeable. She finally went to Scottsdale Mayo and was diagnosed with several autoimmune disorders that tend to go together. The doc is a neurologist, but many different kinds of doctors can if they are interested enough to learn about it. I mentioned in another post about a FB page that is not active but still online. They have a file of doctors' names who have been submitted by mast cell patients. They are shown by state.