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By Mayo Clinic staffYour arms are made up of three major bones and nerves as well as muscles, tendons and ligaments. All are susceptible to damage or injury that can cause arm pain. In some cases, arm pain can originate in your neck or even your chest. The first sign of a heart attack may be pain that radiates into your left arm.
Arm pain can occur anywhere from just below your shoulder to your wrist. Often, the pain is fairly minor, but some fractures and nerve problems can cause severe arm pain and may require extensive medical care. Other types of arm pain usually respond well to home treatments.