There may be the following reasons for the symptoms of arm pain when angry: 1. The most likely cause is the local soft tissue injury of arm pain. Whether it is an acute external force injury, or chronic labor injury, once the soft tissue injury, regardless of the severity of the injury will cause local blood circulation disorders, or local non-infectious inflammation, angry when the heart rate becomes faster, blood pressure increases, blood circulation speed up. But if the soft tissue is damaged, local blood circulation must be impaired, and the local pressure will rise when angry, and the injury will ooze out substances that cause pain, and there will be symptoms of local pain when angry. 2. Some patients who suffer from carpal tunnel syndrome may also have this symptom. Carpal tunnel syndrome is a symptom of increased pressure in the carpal tunnel, which stimulates the nerves. Blood pressure rises when you are angry, which can also lead to increased pressure in the carpal tunnel and pain.