An ankle sprain is a common injury that occurs when the ligaments in the ankle are stretched or torn. It is often caused by twisting or rolling the ankle during physical activity. Symptoms of an ankle sprain include pain, swelling, bruising, and difficulty bearing weight on the affected ankle. Treatment for an ankle sprain typically involves rest, ice, compression, and elevation (RICE therapy). In more severe cases, a brace or cast may be necessary, and physical therapy can help regain strength and range of motion in the ankle. It is important to seek medical attention for proper diagnosis and treatment.