The midline, which is usually the fascia where the rectus abdominis muscles join bilaterally and where the fascia connects to the skin, may also appear without pregnancy. If the lower abdomen suddenly enlarges very quickly, the local skin may not be able to adapt, which may also lead to the appearance of the midline. In addition to pregnancy, people with cirrhosis of the liver, ascites, or sudden accumulation of fat in the abdomen, lower abdomen, or obesity are also likely to see a midline. Generally, if there is no localized pain in the skin, the midline does not require special treatment. If there is local pain, it proves that the skin damage is caused by swelling, and the pain or wound will recover slowly after strict local disinfection.