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
Boyz in the Sink parodies of "boy-bands" including Boyz n the Hood and the Backstreet Boys. "Belly Button", their first song, is Lunt's musical lament that he lacks a navel depicted through his visit to a medical clinic. Tim Hodge voices Khalil the Caterpillar, who appears dressed as a physician who informs Lunt that his stem serves the purpose as a belly button. While originally included as the Silly Song for "The Ballad of Little Joe", the video was released separately and won the Children's Jury Award for Animated Short Film or Video at the 2004 Chicago International Children's Film Festival. The song has