Okay, I've been making good progress lately, but after a combination of things last week, I've developed painful throbbing right above/by my collarbone on the right side when I use my right arm or lift my right hand up towards my shoulder. Now I started getting it by my left collarbone/neck area today, though not as bad as the right. For background, I was diagnosed with bilateral arterial neurogenic thoracic outlet syndrome at a major university, then went to Colorado and was diagnosed with primarily pectoralis minor syndrome. All I know is this doesn't feel like it has anything to do with my pecs, though they are tight, too! Thankfully, I have a physical therapy appointment tomorrow, and am taking some aspirin just in case. Anyone else get this painful, heart-beat-like throbbing in the thoracic outlet area when using your arm? No swelling, but arm feels heavy during throbbing.