- A fracture is a broken or cracked bone that occurs when pressure is applied to bone, with or without displacement of bone fragments. Common causes include direct or indirect forces or force of muscular action. Types include open, closed, complicated, stress, and greenstick fractures. Symptoms include severe pain, difficulty moving, swelling, bruising, deformity, and tenderness. First aid depends on the type and location of the fracture. Treatment may include controlling bleeding, immobilizing the wound, applying ice, consulting a doctor, using bandages or splints, and not moving the injured area. Prevention includes wearing protective gear and practicing safe habits.