Anemia occurs when the red blood cell count is lower than it should be. While there are many factors, colon cancer tumors are probably the most unexpected reason. These tumors actually exhaust the supply of your red blood cells.
Experts explain that fast-growing tumors outgrow the body’s blood supply, which often leads to ulcer formation that seeps blood periodically. Therefore, blood often appears in blood. Other symptoms of anemia include fatigue and weakness.