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.
A trapped nerve can also occur in the arm itself. This can sometimes occur in the wrist (carpal tunnel syndrome) or in the elbow (cubital tunnel syndrome). Pain and tingling in your arm and hand that isn't associated with neck pain may be caused by these conditions.epetitive strain injury may be diagnosed if your arm or elbow pain seems to be caused by a repetitive task and then fades when the task is stopped. It often occurs in people who work with computers or carry out repetitive manual work.