Common early symptoms of colorectal cancer

As the cancer develops, symptoms gradually appear, manifested as changes in bowel habits, abdominal pain, blood in the stool, abdominal mass, intestinal obstruction, etc., with or without systemic symptoms such as anemia, fever and weight loss. Tumor metastasis and infiltration can cause changes in the affected organs. What are the common symptoms of early colorectal cancer?

First of all, in the early stages of intestinal cancer, the main symptom is painless bloody stools, and the blood is red or bright red, which is very similar to the symptoms of early internal hemorrhoids. In the later stages, the bloody stools are mostly dark red, mixed with mucus, blood, or pus in the stool.
Secondly, changes in bowel habits are a typical manifestation of mid-to-late stage colorectal cancer. Due to intestinal irritation symptoms caused by the rectal mass and the secretions it produces, patients experience frequent bowel movements, incomplete bowel movements, tenesmus, etc., but the discharge is mostly mucus, pus and blood, accompanied by changes in stool shape, and the stool becomes thinner and thinner.
Secondly, it is very easy to cause obstruction. As the cancer infiltrates around the intestinal wall, the intestinal cavity is narrowed, especially at the junction of the rectum and sigmoid colon, which is mostly a narrow type of hard cancer, which is easy to cause obstruction. Due to the long-term chronic consumption of the disease, patients with advanced rectal cancer will have some systemic cachexia and unexplained anemia or weight loss, fatigue, and loss of appetite. Patients must pay attention to it in time and go to a professional hospital for examination and treatment.
Finally, once colorectal cancer reaches an advanced stage, it often invades surrounding tissues and organs, such as the bladder and prostate, causing patients to urinate frequently, urgently, and with difficulty. If the lesion invades the presacral plexus, sacral and lumbar pain may also occur. Rectal cancer can also metastasize to the liver, causing hepatomegaly, ascites, jaundice, and even cachexia.