You have been given a lot of good information by Chris47. I subtle symptoms off and on for years. Then after an emergency appendectomy, everything went south. By the time I saw my first rheumatologist I was a hot case of MCTD. I’ve done my research and worked with my “private”team. (Older daughter is a clinical pharmacist and the younger is an Occupational Therapist.) They are both into nutrition and have helped me with my diet also. I’ve learned to stay out of the sun and heat, dress warm in winter, TRY to de-stress and get plenty of rest. Good luck on your quest. 💜🦋