A vertical line below the navel is the white line. The white line is located in the midline of the anterior abdominal wall and is formed by the tendons of the vastus lateralis muscles crossing each other. Everyone will have a white line below the navel, and according to each person’s personal skin color and body type of different, abdominal white line color will be different shades, some people’s abdominal white line may also appear on the hair, which is a normal physiological phenomenon, do not need to worry about too much. When the estrogen secretion of adolescent women is more vigorous, the white line of the abdomen will be more obvious, and with the growth of age or after pregnancy, the color of the white line of the abdomen will also deepen, if you have encountered the above situation, there is no need to be too nervous, it is a normal phenomenon. Therefore, when patients find the white line in the abdomen, they do not need to worry too much, as long as the body does not have any abnormalities, generally do not need to go to the hospital for special examination and treatment.