Navel changes to diet and exercise, unexpected change in shape may be the result of ascites. In addition to change in shape being a possible side effect from ascites and umbilical hernias, the navel can be involved in umbilical sinus or fistula, which in rare cases can lead to menstrual or fecal discharge from the navel. Menstrual discharge from the umbilicus is a rare disorder associated with umbilical endometriosis. To minimize scarring, the navel is a recommended site of incision for various surgeries, including transgastric appendicectomy, gall bladder surgery, and the umbilicoplasty procedure itself. Abdominal thrusts is a first aid method
Cultural views on the navel started, due to the hot climatic conditions. The trend spread to create changes in female fashion such that when a policeman in Gwangju arrested two young women for flaunting their belly buttons in the street, the judge threw the case out, ruling that the flashing of a female navel was not indecent. It further became popular due to Korean pop culture, where K-pop stars started wearing body piercings and midriff-exposing shirts. In July 1997, the South Korean broadcaster KBS announced tough new rules for pop stars appearing on TV. One among the many limitations was "no exposing of navels". During