Please, keep in mind, I am a first-time mother when reading the following:

Yesterday the babysitter called saying Ethan may have dislocated his shoulder, he was napping, but he was favoring it and not using it at all. She said it was tender and he whined and cried whenever he bumped it against something.
Of course, I sprang into action. Larry was also heading home at the time, so he was able to arrive at the sitter's house and pick Ethan up. I wasn't sure what to think since we weren't there. I remember this had happened to me as a child.
I called the pediatrician and as it turns out, it's pretty common - the ailment is Nurse Maid's elbow. I guess the tendon is pulled or jerked out (like pulling kids up by their arms or out of a car, or up off of the ground, you get the picture), but can be manipulated back in. Which, is what happened in about 10 minutes, all better. Interesting.
Thankfully, Larry works for the state and has kick-a$$ insurance. I think Ethan has been to the doctor's office at least 9 times in 20 months, and this does not include the check-up's occuring every two to three months.