A stress fracture is a small crack in a bone that occurs due to repetitive force or overuse, often seen in athletes or individuals who engage in high-impact activities. Unlike a complete fracture, a stress fracture develops gradually and may cause pain, swelling, and tenderness in the affected area. Common locations for stress fractures include the foot, ankle, and shin. Treatment typically involves rest, ice, and sometimes immobilization to allow the bone to heal. Preventive measures include proper footwear, gradual increases in activity, and strength training to support the bones and muscles.