Help me out here dogg, I've had this for a long time. It started when I was 20 and it was chest pain, one big pop and relief for about 5 years. Then about every year after it came until last year after a good work out, it locked. I went to chiro's and m.d.'s and finally with a good stretch it popped and I almost cried from the relief. Ever since I pop it about 4-12x daily and it's affecting my thoracic spine and riding has become unbearable. What was autoimmune you had. samiamaham@yahoo.com if you would be so kind.