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
Navel fetishism have navel piercings or insert sequins into their navels to make it look attractive when they perform. Not only them, many young everyday women also have them to add a charm to their navels. Such decorations also arouse when seen. In India, navel exposure in low-rise saris is more common than western attire. For some Indian men, the sight of a female navel exposed in a sari is considered sexually arousing. Sometimes just the thought of the navel is enough to stimulate. Some navel fetishists sexually fantasize about the above physical acts on a person's navel to attain sexual pleasure.