Internal hemorrhoids and rectal cancer are mainly differentiated from clinical manifestations, such as the color of blood in stool, the nature of stool, and defecation habits. 1. The color of blood in stool: internal hemorrhoids have fresh blood in stool, and after defecation, there will be fresh blood on the wiping paper. In rectal cancer, the color of stool is sometimes dark red, sometimes fresh blood, mucus blood stool, or pus blood stool, and intermittent blood in stool. 2. Change of stool character and defecation habit: internal hemorrhoids usually do not change stool character and defecation habit. However, rectal cancer will cause the stool to become thin and unshapely due to the occupation of tumor. In addition, rectal cancer will also affect bowel habit, such as increased frequency of bowel movement, constipation or feeling of falling down, feeling of incomplete bowel movement and other symptoms. If you find bloody stools, it is recommended to go to regular hospitals for colonoscopy and other examinations, so as to clarify whether it is internal hemorrhoids or rectal cancer, and to treat the cause as early as possible. Do not blindly self-diagnosis and treatment, so as not to delay the condition.