The symptoms of thigh muscle laxity often appear clinically. After the appearance of thigh muscle laxity, first of all, it is necessary to analyze what causes it, and then take the correct treatment according to the specific cause. Clinically, it is common that patients need bed rest after fracture, and after a long period of bed rest, the movement of the lower limbs is significantly reduced, and disuse atrophy occurs, resulting in muscle laxity. If this is the case, the patient should be encouraged, active isotonic contraction exercises of the lower limb muscles should be performed, and passive Chinese medicine manipulation massage should be given locally. This can be combined with local treatment such as acupuncture and moxibustion to promote rich local blood circulation. In addition, if the patient suffers from lumbar spine disease, muscle relaxation in the thighs due to nerve injury occurs because of nerve nutritional disorders and lack of muscle nutrition. If this is the case, proper treatment should be given for the nerve injury, and oral neurotrophic drugs, etc. can be taken, as well as active and passive muscle exercises.