I was diagnosed when I was 19. I didn't have the classic splotches....looking back, my hair color changed and being the fair-skinned young man that I was, I started tanning rather than burning. Started vomiting when stressed, then recovered. My pediatrician felt that I was stressed over family situation and it was psychological. I was forced to see a psychiatrist, but just refused after a few visits. I knew it wasn't that. Then I became very ill, vomiting for several days, unable to keep food down. My Dad had spoken to his Dr about my symptoms. His Dr had diagnosed a patient with Addison's when we was doing his residency. That Dr felt that I had Addison's. Anyway, I was vomiting and doing very badly - couldn't get out of bed. My parents called an ambulance, and put me in the hospital. When I got there, the nurses couldn't get a BP on me and it took several tries to get iv's going (I think they had 3 or 4 in me). The Dr at the hospital felt I had appendicitis because my stomach was so sore from the vomiting. My father's Dr strongly advised them to give me steroids prior to surgery because he felt I had Addison's. He truly saved my life. Nope, I didn't have appendicitis. After that they tested me for Addison's. The first test came back negative and they said I really needed to think about this being a psych issue. I was crushed, but the next day the second test came back positive. They felt the steroids I was on had caused the false positive. Further testing showed I had Addison's. Thank God for my Dad discussing it with his Dr, and with that Dr insisting on the steroids.
I got setup with an amazing endocrinologist, and though it took me a while to get the meds straightened out, and a few 'crisis' trips to the hospital, I eventually learned how to manage the beast.