When adults get a hernia, they can present with a protruding mass, swelling and pain, and if the hernia sac develops blood flow obstruction, they can experience severe pain and so on. Hernias, or hernias as they are known clinically, are common surgical conditions, with extra-abdominal hernias being the most common. 1. After the hernia occurs in adults, if it is a simple easy-to-repeat hiatal hernia, usually only mass and swelling pain, no other special clinical symptoms, the hernia can be retrieved by hand; difficult to retrieve the hiatal hernia swelling and pain is more serious, and the hernia can not be completely retrieved. 2. If the hernia sac is incarcerated or even blood flow obstruction occurs, it will develop into an incarcerated hernia or strangulated hernia, these two types of hernia condition is more serious, and need urgent treatment, otherwise there may be tissue necrosis and other serious consequences. Surgery is usually the treatment of choice to relieve the obstruction and restore normal blood flow.