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.
Inflammation of the bursa and tendons can cause pain that radiates down the arms. The fluid in a sac called the bursa which lies between the tendon and bone can become inflamed. Some sort of physical trauma can cause a fracture in the shoulder or arm, resulting in right shoulder and arm pain. Located in the back and neck, these discs can be damaged. The changed shape of the discs can affect the nerves around, resulting in referred pain and weakness down the arms.