A line running down the center of the abdomen may be the anterior median line, which is normal in most cases. The anterior median line, after the birth of a normal person, most people will exist some people are more obvious, some people are not obvious in comparison, the white line above the navel is wider, below the navel is narrower and stronger. Women may become darker in color after pregnancy. In addition, people who exercise regularly with a lean body shape and the rectus abdominis muscle shows, there is a possibility that the anterior median depression is more pronounced. It is a normal physiological phenomenon that does not cause functional disorders in the body and does not have autonomous uncomfortable symptoms, and does not need to be worried or treated. If there are uncomfortable symptoms, you should go to the hospital in time for further examination, to clarify the cause of the disease and follow the doctor’s instructions, so as not to delay the condition.