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 exposing their navels or navel piercings on court. American tennis player Serena Williams was noted by the media for exposing her navel piercing during her matches. Similarly, retired Russian tennis player Anna Kournikova was known for frequent navel exposure during her matches. In 2009, for an interview to the German magazine "Der Spiegel" when asked about her belly button showing during serves, she commented, "These are men's ravings.Why you should hide it, when it isn't necessary? Female beach volley ball players play in bikinis - does it bother anyone?" American female golfer Laura Diaz commenting to the Ladies Professional Golf