The low pubic bone may be caused by the following reasons: 1, may be caused by the anterior tilt of the pelvis, such as some patients due to personal posture habits, or due to excessive lumbosacral angle, may lead to excessive anterior tilt of the pelvis, manifested as the position of the pubic bone is more backward and downward. 2, may be due to the patient’s own proportion, some patients due to genetic factors, the spine is relatively long, while the lower limbs are relatively short, appearing body proportion The patient’s hip joint may be dislocated, which may cause the position of the pubic bone to look lower. 3, may be caused by hip-related pathology, if the patient has congenital hip dislocation, acetabular dysplasia, or severe hip osteoarthritis, it may lead to a lower position of the pubic bone. 4, may also be related to the sacroiliac joint or spine related pathology, such as the patient has sacroiliac arthritis, or scoliosis.