Acute arm injuries are a severe type of damage to the arm, and the injury usually comes about abruptly by a fall, a direct blow, bending a limb strangely or jamming the limb, reports WebMD. Acute injuries may include muscle ruptures, pulled muscles, bruising, broken bones, dislocation and sprains.
These injuries require immediate medical attention due to severe and sudden pain, notes WebMD. Treatment may include wearing a brace or splint, physical therapy, and surgery. Minor arm injuries are often caused by excess use, sports, work-related duties and house work. Many of these injuries heal on their own with some over-the-counter medications and other home remedies.