The pubic bone is a normal physiological phenomenon, but may also be due to congenital developmental abnormalities, pubic bone fracture, pubic bone joint separation and other reasons, these conditions are often accompanied by local pain and activity disorders, the need for timely medical treatment according to the condition of the treatment. 1. Normal physiological phenomenon: under normal circumstances, the pubic bone has the role of protecting the pelvic organs, generally more convex phenomenon, for the rest of the abdomen is higher, especially for thin women, or special position, such as supine position and strive to lift the pelvis, this phenomenon is more obvious, mostly belongs to the normal physiological phenomenon. 2. Congenital developmental abnormality: some women may have pelvic structure abnormality during their growth and development, resulting in pubic bone bulge. 3. Fracture of pubic bone: some women have fracture of pubic bone due to trauma, fall and other external force, and if the pubic bone heals abnormally after the fracture, it may lead to the change of the pubic bone structure or accompanied by localized swelling, which will make the pubic bone look bulging. 4. Separation of pubic symphysis: Some women are prone to separation of the pubic symphysis after delivery, which may lead to changes in the pelvic structure, and may also lead to bulging of the pubic bone. It may also be caused by occupational lesions of the pubic bone, such as bone tumors. If a woman feels that her pubic bone is protruding, which may be accompanied by localized pain, impaired mobility and other discomforts, it is recommended that she go to the hospital in time, combined with the relevant items of examination, to determine whether it is normal or not, and when abnormalities need to comply with the doctor’s instructions, and the cause of the treatment.