Bleeding in the stool is one of the most common symptoms we experience. Many diseases can cause blood in the stool, and in general there are two categories: benign diseases (hemorrhoids (commonly known as hemorrhoids), anal fissures, inflammatory bowel disease, etc.) and malignant tumors (rectal cancer, colon cancer, etc.), of which hemorrhoids are the most common benign disease causing blood in the stool, and rectal cancer is the most common malignant tumor. However, people often consider blood in stool as fire and hemorrhoids, and do not seek medical treatment. In fact, among many clinical manifestations of rectal cancer (constipation, frequent stool, mucus stool, stool deformation, change of stool habit, blood in stool, etc.), blood in stool is the most common clinical manifestation, accounting for 80% of the complaints of rectal cancer patients. What are the characteristics of hemorrhoids and rectal cancer in terms of stool bleeding? The formation of hemorrhoids is simply due to the varicose veins in the anus. Since the hemorrhoid vascular group is very close to the anal opening, or even right at the anal opening, it will show when the patient holds his breath and exerts himself before the stool, due to the contraction of the anal sphincter, the squeezing of the vascular group ruptures and blood drips or even squirts, so the bleeding of hemorrhoids is characterized by fresh blood; after the stool, the anal sphincter reflexively contracts and blood drips again, and the blood is discharged in step with the stool. The blood is discharged step by step, we call the blood in the stool separated. Therefore, the bleeding of hemorrhoids is characterized by fresh blood dripping or spraying, and the blood in the stool is separated. The bleeding of rectal cancer is generally chronic bleeding from tumor in rectal cavity, and rectum refers to the section of intestine 3-15cm away from anus, so the bleeding of rectal tumor is not sprayed or dripped out in most cases, but mixed with stool, not bright red, but dark red, and the tumor not only breaks and bleeds, but also has stool attached to the broken surface, which will cause secondary infection, resulting in more inflammatory exudate and mucus, so Therefore, the characteristics of rectal cancer blood in stool are: mucus dark red blood stool, mixed with blood in stool. Having said that, do you understand somewhat what the bleeding of hemorrhoids and rectal cancer is all about, but you are still a little nervous? In fact, the incidence of colorectal cancer in China is on the rise and has ranked fourth in malignant tumors, with more than 472 new cases per day. Therefore, we should pay attention to some non-specific symptoms of rectal cancer such as blood in stool and frequent stools, and do not easily think that it is hemorrhoids or anal fissures, etc. We should consult a doctor promptly with these symptoms, and receive rectal finger diagnosis and fiber colonoscopy. If rectal cancer is diagnosed and treated at an early stage, it can still get better treatment effect. According to Seer, the 5-year survival rate of patients with limited rectal cancer is about 90%, the 5-year survival rate of patients with regional lymph node metastasis is about 70%, and the 5-year survival rate of patients with distant metastasis is about 12%. It can be seen that timely consultation and early diagnosis are important factors to get better treatment for rectal cancer. Patients over 40 years old should be highly alert to the possibility of rectal cancer and must seek timely medical consultation if they have the following conditions: a history of colon or rectal cancer in first-degree relatives; a history of intestinal polyp, adenoma or cancer; persistent positive fecal occult blood; a history of mucus and blood stool, chronic constipation or chronic diarrhea, etc.