There is always a gas in the appendix, which may be caused by constipation or chronic colitis or rectal cancer. 1. Constipation: If you eat some indigestible food for a long time, you may suffer from indigestion, which induces constipation. When the food is retained in the intestines, it will cause an increase in the amount of gas, which results in the situation that there is always a gas in the cecum. 2. Chronic colitis: when the intestinal mucosa is infected with inflammation, chronic colitis may be induced, which may cause irritation of the intestinal system, and may cause abdominal pain, accompanied by gas in the cecum. 3. Rectal cancer: Rectal cancer is mainly a disease caused by malignant tumor of rectal mucosa epithelium, which will lead to changes in stool character and frequency of defecation, and may cause obstruction of defecation, affecting normal defecation, and there will be a gas in the intestines. There may be other reasons why there is always a puff of gas inside the appendix, so it is recommended to go to the hospital for examination and treatment according to the cause.