Bowel cancer can be roughly divided into two types: colon cancer and rectal cancer, and it is said that when bowel cancer comes, there will be symptoms of "1 red, 2 odor, 3 pain", and not every disease will have such characteristic clinical manifestations. This is especially true for colon cancer and rectal cancer, as the cancerous tumors do not occur in the same place, so the clinical manifestations are also obviously different.

I. Clinical manifestations of colon cancer:

Colon is a part of large intestine, and the length of colon is relatively long, there are ascending colon, descending colon, sigmoid colon and transverse colon, and from the division of abdomen, colon cancer can be divided into two types: left and right colon cancer.

1. Abdominal pain: it is a clinical manifestation of colon cancer in early stage, according to the location of cancer tumor, there can be pain in left and right abdomen, but the location is usually vague. In the early stage of colon cancer, the symptom of abdominal pain is not obvious, which is easy to be neglected by the patients themselves, resulting in the development of bowel cancer to the late stage.

2. Diarrhea and constipation: after the occurrence of intestinal cancer, it will cause certain changes to the internal environment of intestines, especially when the cancer ruptures, it will cause inflammation of intestines, leading to diarrhea, and when the cancer destroys the normal intestinal mucous membrane, it will cause abnormal peristaltic and excretory functions of intestines. The main reason why there are constipation symptoms is that when the cancer grows gradually towards the intestines, it may cause blockage of the intestines, and in serious cases, it may lead to the appearance of intestinal obstruction.

3, blood in stool: when the tumor develops gradually, it will erode the blood vessels in the surrounding, and secondly, when the tumor occurs in the middle and late stages, the rupture and bleeding of the tumor itself will also lead to the appearance of blood in stool.

4, mucus stool and pus blood stool: when there is inflammation and infection in the intestinal tract and bacterial growth, the mucus secretion in the intestinal tract will naturally increase, while pus blood stool is mainly said to mean that the intestinal cancer or enteritis develops to a more serious period.

The clinical manifestations of rectal cancer:

The rectum is close to the anus, and its characteristic is thick and short, in the common people's knowledge, rectal cancer is usually easy to be confused with hemorrhoids.

1, blood in stool: it is sometimes difficult to distinguish blood in stool of rectal cancer and hemorrhoids, which is also the reason why it is sometimes difficult to identify these two diseases. Although blood in stool of rectal cancer and hemorrhoids is mainly in bright red color, the bleeding of rectal cancer is mainly in wrapped feces.

2. Change of stool shape: when bowel cancer develops, it will block and squeeze the already formed stool, so the stool of rectal cancer patients is mostly in the form of thin strip and flat strip.

3. Self-feeling: rectal cancer is characterized by rectal irritation, which is mainly characterized by incomplete bowel movement, urgency, frequent bowel movement and so on.