Intestinal obstruction and the barrier to the passage of intestinal contents can lead to intestinal obstruction, typically characterized by abdominal pain, bloating, cessation of passing gas and stools, and in cases of high intestinal obstruction, it may also involve nausea and vomiting. How long fasting should be continued in the case of intestinal obstruction depends on whether the patient has resumed passing gas and stools, as well as whether symptoms such as abdominal pain, bloating, nausea, and vomiting have subsided. If the patient's abdominal pain and bloating have mostly subsided, passing gas and stools have resumed, and there is no bloody stool or symptoms of nausea and vomiting, then a gradual reintroduction of a liquid diet can be started. If abdominal pain and bloating do not worsen, and there is passing gas and stools, then a transition to a semi-liquid diet until a normal diet is resumed can be made. Therefore, the duration of fasting for intestinal obstruction should be determined based on the effectiveness of the treatment for the obstruction.