On a December morning in 2013, this Metro-North train headed towards New York City derailed in the Bronx, killing four passengers and injuring 115. The driver was later found to have severe sleep apnea. This wasnât the first incident involving trains or the last. Learn more.
Arm pain can be caused by a wide variety of problems, ranging from joint injuries to compressed nerves. Depending on the cause, arm pain can start suddenly or develop over time. In many cases, arm pain actually originates from a problem in your neck or upper spine. Arm pain, particularly pain that radiates into your left arm, can even be a sign of a heart attack. Causes.
Tennis elbow or lateral epicondylitis is a frequent cause of arm pain and is caused by damage of the tendons involved in bending the wrist backwards, away from the palms. There may be recurring pain at the back of the forearm and elbow when the arm is at the side of the body with the thumb turned away.