Colon cancer is the fourth most common form of cancer in men, according to the National Cancer Institute. Obese people over the age of 50 who smoke, drink alcohol or have a history of bowel problems are at the highest risk of developing colon cancer. Colon cancer symptoms in men are similar to symptoms experienced by women with this disease.
Weight Loss
Cancer cells that grow along the interior wall of the colon can disrupt the way in which food is absorbed from the digestive tract. Poor nutrient absorption can lead to unintended or unexplained weight loss in men with colon cancer. Weight loss can occur gradually over time and may occur even if a man maintains a healthy appetite.
Diarrhea or Constipation
Persistent changes in a man's bowel habits can be a symptom of colon cancer, according to MayoClinic.com. Bowel irritation caused by the intestinal presence of abnormal cells can result in diarrhea or constipation. Affected men can also experience uncomfortable abdominal symptoms, such as bloating or cramping, in conjunction with bowel movement changes. As cancer cells continue to replicate within the intestine, a man's colon can become narrower, causing his stools to appear unusually thin. Certain men can also develop rectal bleeding, which can make stools appear dark or red in color, the American Cancer Society warns. These symptoms of colon cancer in men can be signs of alternate medical problems, such as an infection or inflammatory bowel disease. Men who experience chronic diarrhea or constipation should seek medical care to ensure receipt of appropriate evaluation and treatment.
Weakness or Tiredness
Men with colon cancer can experience unusual weakness or tiredness as symptoms of disease, ACS reports. Inadequate nutrition due to colon cancer prevents the body's organs from generating enough energy to sustain the body. Consequently, affected men may take frequent naps throughout the day or can have difficulty concentrating while at home or work. Physically active men may notice that it becomes harder for them to lift weights or work out due to sensations of weakness or fatigue.
Nausea or Vomiting
Colon cancer can cause upset stomach symptoms in men. These symptoms most commonly include nausea or vomiting, which can lead to decreased appetite or weight loss, Sutter Health explains. Affected men can notice that they become full quickly after eating a small snack or part of a meal. Typically, nausea or vomiting symptoms in men with colon cancer also occur in conjunction with bowel movement changes.
