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 the 2000s, it became common among young women to expose their belly buttons by rolling up their shirts similar to a crop-top. During sport events such as football, the female audience apply body paints or temporary tattoos around their belly buttons. In 2010, Korean girl group Rainbow's dance routine that involved lifting up their shirts to expose their navels became popular. The band stated in an interview, "We have to keep our abs in shape for the belly button dance." But the routine was subsequently has been banned. The SBS TV show "Inkigayo" told girl groups to restrain showing their