Hip bone protrusion may be caused by physiological factors, congenital developmental abnormalities, trauma, bone tumor and other pathological factors. 1. Physiological factors: part of the population is relatively thin and weak, the fat tissue and muscle is weak, the hip bone looks more prominent. 2. Congenital developmental anomalies: congenital hip dislocation and scoliosis and other diseases, patients will appear hip bone protrusion. 3. Trauma: due to trauma caused by hip fracture and other injuries, the patient can appear after healing local soft tissue hyperplasia and bony deformity healing, the patient will appear hip bone protrusion. 4. Bone tumor: due to various reasons caused by abnormal bone proliferation to form benign and malignant tumors, patients may appear hip bone protrusion. Hip bone protrusion may also have other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.