I. Why does gluteal dystocia occur? Some frail children aged 4-8 years old often receive multiple intramuscular injections of gluteal muscles due to recurrent respiratory infections, tonsillitis, bronchitis, pneumonia or enteritis, with the main drugs being antibiotics and antipyretics and analgesics. Among them, especially the potassium salt of penicillin is very irritating and repeated injections are most likely to cause local chemical inflammation followed by fibrosis. According to the research findings, among them, benzyl alcohol as a dissolving agent of penicillin, mainly for pain relief, but it also has the side effect of causing muscle fiber degeneration, resulting in the formation of hard knots, which leads to gluteus contracture. The main clinical manifestations of gluteus contracture Children with injection-type gluteus contracture mainly show abnormal posture and gait, especially when squatting, when squatting both knees can not come together, both legs must be separated. In severe cases, it is not possible to cross the legs in a sitting position. When supine, the knees are separated, when standing, the two lower limbs are mildly externally rotated, the feet can not be completely together, “outward eight”, walking stumbling, especially when fast walking or running, it is jumping, like the strange “Chaplin gait” on the stage. If the disease can be treated surgically in time, not only the surgical method is simple, and the surgical effect is good, otherwise the condition is getting more and more serious, and even affect the child’s pelvic development, causing structural changes in the bones, to a certain period of time can also lead to pseudo-isometric lower limbs, pelvic tilt and secondary scoliosis and other symptoms appear. This disability will not only bring daily inconvenience to the affected children, affecting their psychological and personality health growth, but also bring endless distress and lifelong regret to their future study, life, work, communication, and even marriage. There is experimental evidence that the more intramuscular injections in the buttocks, the more chances of causing the disease, and the earlier the age of onset, the more serious the disease will be. In order to prevent the disease from occurring in the first place, it is necessary to use the medication reasonably during childhood, and not to inject the buttocks intramuscularly whenever it can be taken orally. When the medication must be injected intramuscularly, the course of treatment should be declared for 3-5 days and should not exceed 2 weeks at most. During the course of treatment, apply hot towels externally to the intramuscular injection site twice a day for 10 minutes each time. For children with too many injections, physiotherapy should be given after each course of treatment to improve the blood circulation of the damaged tissues and promote the healing of the injury. For children who have developed “hip contracture”, once diagnosed, surgery should be performed as soon as possible to prevent complications such as pelvic tilt and secondary scoliosis, which can affect the normal development of the child.