Upper abdominal pain can be no big deal—or it can merit a trip to the ER. Here's how experts say you can tell the difference.

"My shoulder pain wakes me up if I roll over on that side during the night." Those are two of the most common statements made by tennis players complaining of shoulder and upper arm pain.

Just as in angina, heart attacks can cause sudden left arm pain. A 2013 study found that 17% of the surveyed people who had heart attacks also had radiating pain down the shoulder, upper arm ...