The pain in the front of the thigh from the outer thigh injury may be muscle injury, or a femur fracture may have occurred, and it is recommended that the patient go to the hospital in time to check and clarify the cause of the disease. 1. Muscle injury: the outer thigh injury can cause muscle injury, resulting in small blood vessel rupture in the soft tissue and localized pain, swelling, subcutaneous bruising. 2. Femur fracture: violent impact on the outer thigh can lead to femur fracture, fracture can cause severe pain and obvious swelling of the thigh, large ecchymosis of the skin, and angular deformity, at the same time due to excessive blood loss can cause hemorrhagic shock. If the patient’s lateral thigh injury is accompanied by pain in the front of the thigh, the pain symptoms continue not to disappear, you should go to the hospital in time for examination, but also X-ray examination, to clarify whether there is a fracture, and then according to the cause of the targeted treatment.