The back of the thigh muscle pulling close to the pain is usually considered to be due to muscle strain, skeletal muscle disease and neurological disease, etc., specific needs to be based on clinical symptoms to determine. 1. Muscle strain: generally seen in the process of sports, sudden and intense exercise caused by the presence of focal limitations, considering the posterior femoral flexor muscle group injury. Mild injuries require braking and rest, while severe injuries require timely medical treatment. 2. Skeletal and muscular diseases: consider that there may be aseptic inflammation, vascular or muscle occupying lesions or atypical symptoms caused by femoral head necrosis. 3. Neurological disorders: sciatic nerve pain, pyriformis muscle compression syndrome, gluteal epithelial neuritis, or lumbar disc herniation may cause nerve damage, resulting in corresponding neurological symptoms and pain. When the symptoms are mild, rest and physical therapy should be the main consideration, but when the symptoms are serious, you need to go to the hospital for further examination and treatment according to the doctor’s instructions.