There are two main reasons for the appearance of hernia, one is the weakening of the abdominal wall strength, meaning that the belly is getting weaker and weaker, can not stop coughing or holding their breath from the stomach out of the top of the force, of course, clinically common is the localization of the belly in a place obviously weak; the second is the increase in intra-abdominal pressure, meaning that because of a variety of reasons for the top of the belly to the top of the force of the belly out of the more and more big. The common reason for the weakening of the abdominal wall strength is that people’s belly congenitally have a few places relatively weak, such as the groin, navel, abdominal white line, half-moon line, waist eye and so many places; another reason is due to a variety of reasons for poor nutrition, thin belly; the third reason is due to the treatment of diseases that require the belly has been opened up, and after the knife and due to coughing, malnutrition, or infections, and other reasons did not grow, will also appear hernia. The common cause of increased intra-abdominal pressure is chronic cough, chronic constipation or urinary difficulties, a few people due to cirrhosis of the liver secondary to a large amount of ascites, or practicing weight lifting and other cases of improper exertion, the same can produce a hernia. Knowing the common causes of hernia, we can take targeted measures to prevent hernia as much as possible. Exercises to strengthen the abdominal muscles and timely treatment of coughing, constipation and urination difficulties can prevent hernias as much as possible.