Hernias may also occur as a result of congenital malformation, a congenital diaphragmatic hernia. Abdominal contents may protrude through the ring in inguinal hernia. Robb Flynn requiring emergency surgery to treat an inguinal hernia. Repair techniques are similar for femoral and inguinal hernia. Abdominal wall hernia may occur due to trauma. A failure in this process can cause indirect inguinal hernia or an infantile hydrocoele. The following are potential causes of a hiatal hernia. "Indirect inguinal hernia" is still the most common groin hernia for females. Risk factors include obesity, pregnancy, smoking, hiatal hernia, and taking certain medicines. The hernia truss is intended to contain a reducible inguinal hernia within the abdomen. In July 2017, Carter discussed his health problems, namely a hiatal hernia and lactose intolerance. He was diagnosed with a hernia and underwent surgery. Some choose to perform gonadectomy if and when inguinal hernia presents. He later had prostate surgery and a hernia operation. It is the most common cause of groin hernia.