Delayed onset muscle soreness (DOMS) is a common condition that occurs after intense physical activity, especially when the body is not accustomed to the exercise. It typically manifests 24 to 72 hours post-exercise and is characterized by muscle stiffness, tenderness, and swelling. DOMS is believed to result from microscopic damage to muscle fibers during strenuous activities, particularly those involving eccentric contractions. The severity of DOMS can vary based on factors such as the type of exercise, intensity, and individual fitness levels. While it can be uncomfortable, DOMS is generally considered a normal response to increased physical activity and usually resolves on its own. Proper warm-up, cool-down, and gradual progression in exercise intensity can help minimize its effects.