Hi! Thanks for replying. Well I can not pinpoint any specific accident or injury that would cause the TOS. I woke up one morning and I couldn't move my shoulder at all. It literally felt stuck in place and I had to force it to move. Ever since Ive had pain on the top of my shoulder (AC joint area?) and it progressed to pain, tingling, and numbness down my arm into my hand. I also feel radiating pain in my neck as well. Its even hard to type this because my arm gets tired, I feel the pain worsen in my shoulder, and I feel tingling in my forearm. I work in a daycare where I am picking up and holding children alot. Also, I have, on occasion, helped my husband with lifting very heavy things that caused multiple strains in my lower back. Also, I usually carry a backpack with me everyday. I have stopped wearing it, though since I've read that it will aggravate TOS symptoms. I am quite large chested and I would say I probably do have some postural issues. What stretches or exercises would you recommend for me? Also, is there anything specific I should bring up with my doctor that I havnt already discussed with her? Thank you for your help!