I've got what feels like an AC Joint Sprain but without a fall or some other trauma. Pain to the touch at the intersection of collarbone and shoulder, pain crossing arm across chest, raising arm, any push/pull movement. Weak on that side too now

What the heck did I do?

aggiederelict said:

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You slept wrong and you are paying the price. You has the olds.

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Sadly, I think you're right! I had a colonoscopy and endoscopy 3 weeks ago and I've been wondering if I was put in an odd position that stretched it out (definitely no pun intended).

Usually they keep you on your side, almost in the fetal position, for those. But usually they have you get into that position before giving you sedatives. Entirely possible your shoulder kinda was in a funky position for longer than your body liked though. Could also be that it unmasked an underlying shoulder impingement as well.

With no trauma it is likely tendinitis. Just rest, ice. If really bad or persistent can consider a local steroid shot

KidDoc said:

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With no trauma it is likely tendinitis. Just rest, ice. If really bad or persistent can consider a local steroid shot

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Thanks! Just came out of nowhere, sucks getting old.

Maybe AC arthritis? I was diagnosed with it over ten years ago and thought I might be headed towards surgery, but a cortisone shot and PT "cured" me in a few months.