The difference between strains and sprains, strains are caused by strains, especially in heavy lifting, heavy lifting, excessive dragging of limbs and violent squatting, running and jumping activities, which can lead to excessive strains of muscles and ligaments, thus causing strains of muscles and ligaments. Sprains are mainly caused by twisting, especially in weight-bearing activities, excessive twisting of joint parts will lead to excessive flexion of ligaments and muscles, causing sprains of ligaments and muscles. Therefore, the difference between strains and sprains is mainly due to different causes of force, strains are caused by excessive stretching, while sprains are mainly caused by excessive twisting of ligaments and tendons. Sprains are mostly seen in the ankle, foot and knee joints of the lower limbs.