What causes blood in male urine?

1. Blood from the upper digestive tract. The stool is asphalt-like or gray-black, accompanied by anemia, weight loss or upper abdominal lumps of unclear cause. It is often caused by gastric cancer bleeding. It is accompanied by acid reflux, hiccups or night pain and hunger pain, indicating that there is a high possibility of bleeding from gastric and duodenal ulcers. If there is a history of liver disease or schistosomiasis, it may be esophageal bleeding due to liver cirrhosis. However, when the amount of gastrointestinal bleeding is large, the stool can also be bright red or dark red, and it is usually combined with vomiting blood. Once gastrointestinal bleeding occurs, especially when it is internal bleeding, you should go to the hospital outpatient clinic immediately and receive a gastroscopy to confirm the diagnosis.

2. Blood from the lower gastrointestinal tract is bright red.

1. Hemorrhoids: Hemorrhoids are the most common cause of blood in the stool. Bleeding usually occurs during defecation. The blood is bright red and adheres to the surface of the feces. It can also drip or gush out after defecation. The bleeding is minimal and can only be seen on the toilet paper. When straining to defecate, small lumps will slip out of the anus.

2. Anal fissure: The blood in the stool caused by anal fissure is bright red, often occurring after constipation, with less bleeding. The main manifestation is blood dripping from the anus after defecation or blood on the toilet paper, accompanied by severe pain in the anus during defecation. The pain is slightly relieved after defecation, and then starts to hurt again.

3. Colorectal cancer: 85% of early-stage rectal cancers are only manifested as blood in the stool. More than 90% of rectal cancer cases are misdiagnosed as hemorrhoids in the early stages, of which 1% to 3% are eventually diagnosed as rectal cancer. The blood in the stool caused by rectal cancer is more similar to hemorrhoid bleeding, but most of the blood or stool is stained with mucus and light-colored blood clots, accompanied by anal prolapse, deformation, narrowing, increased frequency or continuous bowel movements during bowel movements; colorectal cancer usually has changes in bowel habits, including constipation, diarrhea or alternation of the two, followed by abdominal pain, abdominal discomfort or abdominal lumps, and anemia and weight loss may occur in the late stages.

4. Rectal polyps: The blood in the stool caused by rectal polyps is bright red, painless, and the blood does not mix with the stool.

5. Colitis and proctitis: Most of the blood in the stool is stained with mucus and presents as mucus, accompanied by abdominal pain, fever, increased frequency of bowel movements and incessant bowel movements.

3. Systemic diseases, accompanied by systemic bleeding. Hematochezia is accompanied by bleeding of the skin, mucous membranes or other organs of the human body. It is common in blood diseases and other systemic diseases, such as sepsis, hemophilia, uremia and some rare infectious diseases.