The hip bone consists of ilium, pubic bone and sciatic bone. Common bony markers on the body surface are iliac crest, anterior superior iliac spine, posterior superior iliac spine, pubic symphysis and sciatic tuberosity. 1. Iliac crest: the iliac crest can be touched on the surface of the body, and people with thin body types can directly see that the iliac crest is located in the lower part of the abdomen, above the perineum on both sides of the pelvis. 2. anterior superior iliac spine: the anterior projection of the iliac crest, symmetrically distributed on both sides, the Mai’s point is determined as the middle and outer 1/3 of the line connecting the right anterior superior iliac spine and the umbilicus, while the middle and outer 1/3 of the line connecting the left anterior superior iliac spine is often used to carry out abdominal puncture. 3. Posterior superior iliac spine: the posterior projection of the iliac crest, the line of bilateral posterior superior iliac spines, generally flat against the fourth lumbar vertebrae, which is commonly used to locate the lumbar puncture point. 4. Pubic symphysis: the connection between the two hip bones in the front, that is, the pubic symphysis, located above the perineum. 5. Sciatic Node: When a person is sitting, the bump under the buttocks can be touched, which is the sciatic node. If you have any discomfort in the hip area, please go to the hospital in time, complete the relevant examinations, make a clear diagnosis and follow the doctor’s instructions for treatment or treatment, so as not to delay the condition.