The manifestation of leg muscle strain is obvious swelling and pain at the strained area, local hematoma, pain on pressure, obvious tenderness, accompanied by subcutaneous ecchymosis, skin bruising, often accompanied by pain aggravated by weight-bearing, and severe inability to weight-bearing, and accompanied by pain aggravated by the movement of hip joints, movement of knee joints. Severe muscle strain, in the slight muscle contraction will lead to pain, muscle strain in the line of flat film examination can not be visualized, will not be accompanied by obvious abnormalities, in the majority of complaints of muscle strain can be heard in its abnormal sound. If a muscle strain is suspected, a magnetic resonance imaging (MRI) can be performed to determine the extent of the muscle tear and which muscle has been torn, and depending on the extent of the tear, a treatment plan can be determined, as well as the duration of braking of the affected limb.