Distribution of thigh muscles in human body: There are gluteus maximus, gluteus medius, gluteus minimus and piriformis at the proximal end. There are medial femoral muscle, lateral femoral muscle, medial femoral muscle and rectus femoris (collectively called quadriceps femoris) in the middle and front of thigh. There is a biceps femoris behind the middle thigh. There are adductors in the inner thigh, including adductor, long adductor and short adductor. Near the knee, the medial and lateral heads of gastrocnemius muscle are attached to the back of femoral condyle. The muscles around the thigh are sartorius muscle, tensor fascia lata muscle, semimembranous muscle, semitendinosus muscle, psoas major muscle and so on.

The muscles above the thigh and knee are usually iliotibial tract. The current situation is generally iliotibial tract, which is easy to induce hard mass formation after strain. After the disease is formed, functional exercise is needed to help improve the status quo. It is generally difficult to recover after a strain. It is recommended to keep observation. Hematoma is easy to form after injury and will get better after rest.

The quadriceps femoris consists of rectus femoris, lateral femoris, medial femoris and medial femoris, which are located in the front of thigh. When the quadriceps femoris contracts, pull the tendon on the knee and straighten the knee. Humans walk and run on these muscles, and quadriceps femoris is one of the largest and most powerful muscles in human body. The thigh is divided into three muscle groups: anterolateral, posterior and medial. The anterolateral thigh muscles are mainly composed of quadriceps femoris, sartorius and tensor fascia lata. Posterior thigh muscle (posterior thigh muscle) is mainly composed of biceps femoris, semitendinosus and semimembranous muscle. The medial thigh muscle is mainly composed of adductor, pubis, adductor brevis, adductor longus and gracilis.

The muscle of the inner thigh is called the lateral thigh muscle, which is connected between the two bones of the greater trochanter and the condyles on both sides of the femoral head. The key function of this muscle is to fix the external rotation of the thigh root. If there is muscle pain in this area, it may be caused by some tendon injuries or diffuse aseptic inflammation. Generally, it is the lower limbs, especially the thighs, which is more common for people who often exercise.