Blood clots in the stool may be associated with intestinal cancer, but they may also be associated with other gastrointestinal diseases and cannot be generalized. There are many diseases that cause blood clots in stool, and they need to be identified in combination with other symptoms. For example, ulcerative colitis is usually accompanied by abdominal pain, bloating and other abdominal discomfort; upper gastrointestinal bleeding can lead to a small amount of blood in the stool, dark red or coffee-colored, usually accompanied by stomach acidity, stomach pain and stomach bloating and other symptoms. Colon tumor may also lead to the symptoms of blood clots in stool, but at the same time, there are changes in stool habits such as incomplete stool, change in shape, urgency, and even symptoms such as intestinal obstruction and lymphomegaly. Therefore, when there are dark red blood clots in stool, you need to go to gastroenterology department for examination and clear diagnosis by combining the examination results and specific symptoms and other comprehensive analysis.