It is an indisputable fact that humans evolved from animals on all fours. In the long evolutionary process from animal to human, the acquisition of the ability to walk upright was an important milestone that freed the forelimbs of our distant ancestors and gradually transformed them into dexterous hands that could make tools and engage in fine production work. However, walking upright also brought many diseases to humans, such as cervical spondylosis, lumbar spondylosis, hemorrhoids, miscarriage, varicose veins in the lower limbs, and inguinal hernia. For millions of years, these uninvited diseases have plagued mankind and lingered on. Scientists have speculated that walking upright was a sudden event in the long history of human evolution, and that other tissues and structures in the human body have not had time to adapt to this huge change, resulting in diseases. Today, let’s first take a closer look at how small intestine gas occurs. Like animals, the human abdominal cavity is like a closed pocket containing important organs such as the liver, gallbladder, pancreas, spleen, and stomach and intestines. When walking upright on all fours, the pressure on the abdominal wall caused by the earth’s gravity on the tissues and organs in the abdominal cavity will mainly act on the abdominal wall at the junction with the bilateral thighs, which is medically called the “groin”, and it is precisely this part of the abdominal wall that has two weak points. These two weaknesses are certainly present in animals on all fours, but because they are on all fours, this “weakness” is almost negligible and does not cause disease. But for humans who walk upright, these two weaknesses become the source of disease. When the tissue or organs in the abdominal cavity “protrude” from this weak spot outside the seemingly pocketed abdominal cavity, “small intestine gas” occurs. The medical term for this disease is “inguinal hernia”, also commonly known as “hernia”. A “hernia” is “a disease caused by an organ or tissue of the body leaving its original normal position”. ”Hernia was one of the first diseases recognized by mankind, and was recorded in the ancient Egyptian medical texts more than 3,000 years ago. Hernia was discussed in detail in ancient Roman medical writings more than 2,000 years ago. However, to this day, the understanding of hernia is still being improved and the treatment of hernia is still being improved. Although humans walking upright have a congenital defect in the groin that causes “small intestine gas”, the number of people suffering from “small intestine gas” is actually still a minority, mainly the elderly and children, and the incidence of women is only one fifteenth of that of men. This is mainly because the body still has mechanisms to counteract weaknesses in the abdominal wall, and the degree of weakness varies greatly from person to person. People with significant congenital weaknesses in the groin exhibit an inherent “small bowel gas”, while older people have a higher incidence because the defect becomes more pronounced with age. The diagnosis of “small intestine gas” is not difficult. If a soft lump appears at the root of the thigh, which disappears when lying down or pressing with the hand, and reappears when standing for a long time, strenuous exercise or walking, the diagnosis is basically established. When you find yourself with “small intestine gas”, do not worry, because surgical treatment of “small intestine gas” is simple, effective, and is becoming more and more perfect.