Things to know about bowel cancer signs and symptoms

Bowel cancer is a malignant tumor arising from the inner wall of the colon. Bowel cancer may manifest in many different ways:
- A change in bowel habits that continues for several weeks may often be the first noticeable sign of cancer.
- A week of diarrhea following constipation or feeling that the bowel doesn't empty completely is one of the early warning signs of bowel cancer.
- General abdominal discomfort (frequent gas pains, bloating, or cramps) that can be confused with indigestion is one of the early symptoms of bowel cancer.
- Symptomatic or asymptomatic anemia (low level of hemoglobin in the blood) may be a sign of constant bleeding as it happens with large polyps and in bowel cancer.
- Weight loss without conscious dieting efforts is also a sign of bowel cancer.
- Rectal bleeding or passing blood in motions may look like red blood or black. Sometimes, passing mucus with the blood in feces is also considered an important sign of bowel cancer.
Other common signs and symptoms of bowel cancer may include:
- A feeling of fullness or bloating in the abdomen (belly) or a strange sensation in the rectum, often during a bowel movement
- Weakness or fatigue, unexplained feelings of tiredness and breathlessness, or a lack of energy
- Bloating or discomfort caused by eating
- Rectal or anal pain
- A lump in the rectum or anus
- A lump or mass in the abdomen
- A blockage in the bowel
What are the causes and risk factors of bowel cancer?
Bowel or colorectal cancer usually affects the large intestine. Bowel cancer develops from the uncontrolled multiplication of the cells that cover the inner lining of the bowel. Often, bowel cancer develops from polyps, the small and non-cancerous growths of tissues. Bowel cancer may run in families as well. This cancer affects people of all ages. The cells that have become cancerous may spread to other areas of the body such as the liver or lungs. This is called advanced bowel cancer.
8 Causes and risk factors:
- Older age: Most people with bowel cancer are older than 50 years, and the risk increases with age.
- Polyps: Having numerous polyps in the bowel is a known risk factor.
- Bowel diseases: People who have an inflammatory bowel disease such as Crohn’s disease or ulcerative colitis have a significantly increased risk, particularly if they have had it for more than 8 years.
- Lifestyle factors: Being overweight and having a diet high in red meat or processed meats such as salami or ham are risk factors for bowel cancer.
- Addictions: Drinking alcohol and smoking are risk factors for bowel cancer.
- Strong family history: A small number of bowel cancer runs in families.
- Other diseases: People who have had bowel cancer once are more likely to develop a second bowel cancer; some people who have had ovarian or endometrial (uterine) cancer may have an increased risk of bowel cancer.
- Rare genetic disorders: A small number of bowel cancers are associated with an inherited gene, for example, familial polyposis coli.

IMAGES
Colon Cancer Illustration Browse through our medical image collection to see illustrations of human anatomy and physiology See ImagesCan bowel cancer be cured?
Bowel cancer is treatable and can be cured, particularly if it is diagnosed early. Nine out of 10 people with stage I bowel cancer survive 5 years or longer after they are diagnosed. However, this survival rate drops significantly the longer a person has the disease before diagnosis. The number of people dying from bowel cancer each year has been falling since the 1970s. Guidelines generally recommend that colon cancer screenings begin at the age of 50 years.
Treatment options:
- Radiotherapy: This involves using radiation to attack the cancer cells.
- Chemotherapy and biological therapy: These involve using medications to attack the cancer cells.
- Targeted therapies: These are also used in which a newer group of medicines increases the effectiveness of chemotherapy and prevents cancer from spreading.
- Surgery: The affected part of the large bowel is removed.
- This is the most effective way to treat bowel cancer, particularly if the cancer is limited to the bowel.
- It can usually be performed using keyhole surgery, which means a faster recovery, small scars, and less pain after the procedure.
- In some cases, depending on the location of the growth, surgery may lead to the need for a stoma where the bowel opens into the skin on the front of the abdomen. This can be an ileostomy or a colostomy. It can be permanent or temporary. Your doctor will discuss this with you prior to your surgery so that you are fully aware of the implications for you.
Health News
- AHA News: This Tick Season, Beware the Tiny Bugs That Can Carry Lyme Disease – a Danger to the Heart
- Ticks Can Take a Licking From Really Tough Weather
- Drug Might Help Slow Nearsightedness in Kids
- Does Your Kid Need a Summer Vacation From Smartphones?
- Get in the Swim: Summer Pool Safety Tips
More Health News »
Health Solutions From Our Sponsors
Top What is the first sign of bowel cancer? Related Articles
Can Blood Tests Detect Colon Cancer?
Colon cancer begins in the large intestine, which is the final part of the digestive tract. The functions of the intestine are reabsorbing fluids, processing waste products and eliminating solid waste from the body. Colon cancer is characterized by the development of malignant tumors arising in the inner wall of the colon or rectum. It usually begins as small, noncancerous (benign) clumps of cells called polyps that form on the inside of the colon. Over time these polyps can develop into colon cancers.Can Colon Cancer Occur in Your 20s?
Colon cancer can occur in people in their 20s, and more and more young people are being diagnosed with the disease. Learn about when you should start screening.Colon Cancer (Colorectal Cancer)
Colon Cancer (Colorectal Cancer) is a malignancy that arises from the inner lining of the colon. Most, if not all, of these cancers, develop from colonic polyps. Removal of these precancerous polyps can prevent colon cancer.Colon Cancer: How Your Food and Diet Can Affect Colorectal Cancer Health
Diet, including nutrient, antioxidant, and vitamin intake, affects colon cancer risk. Certain dietary factors either decrease or increase the risk of colorectal cancer, breast cancer, and other diseases. Dietary factors may either inhibit or stimulate the development of cancer cells. Have a nutrition plan that decreases the risk.Colon Cancer Illustrations
Most, if not all, of these cancers develop from colonic polyps. Removal of these precancerous polyps can prevent colon cancer. See a picture of Colon Cancer and learn more about the health topic.Colon Cancer Prevention
Colorectal cancer is both curable and preventable if it is detected early and completely removed before the cancerous cells metastasize to other parts of the body. Colonoscopy and flexible sigmoidoscopy (along with digital rectal examination and stool occult blood testing) are both effective at preventing colo-rectal cancers and detecting early colo-rectal cancers.
Colon and Colorectal Cancer Screening
Colon cancer is preventable by removing precancerous colon polyps, and it is curable if early cancer is surgically removed before cancer spreads to other parts of the body. Therefore, if screening and surveillance programs were practiced universally, there would be a major reduction in the incidence and mortality of colorectal cancer.Early Signs of Colon Cancer
Colon or colorectal cancer may not cause any symptoms during the early stages of the disease. A person may have polyps or colon cancer but may not have any symptoms till the late stages of the disease.Colon Cancer: 8 Early Warning Signs & 4 Stages
Colon cancer usually does not cause signs or symptoms in the early stages. As the cancer grows, signs may include blood in the stool, bowel habit changes, abdominal pain, and fatigue. Learn about stages and treatment of colon cancer.How Can Colon Cancer Be Avoided?
Appropriate lifestyle management, such as eating a proper diet, and regular colon cancer screening could help prevent colon cancer.How Do Bowel Movements Change With Colon Cancer?
Colon cancer can't be seen or felt, it reveals itself through some early symptoms. Colon cancer poop may look like loose stools, constipated stools, or bloody stool.IBS Slideshow
What is irritable bowel syndrome (IBS)? Learn about symptoms, causes, and foods that trigger IBS. Get lifestyle tips for managing IBS through diet and with IBS medications.IBD Slideshow
What is inflammatory bowel disease? IBD can include Crohn's disease and ulcerative colitis. Learn more about testing, treatments, and the home care needed to manage inflammatory bowel disease.Where Is Colon Cancer Pain Felt?
Colon cancer is cancer of the last part of the large intestine. Colon cancer pain is generally felt as vague abdominal pain or cramps.Who Is at a High Risk of Colon Cancer?
Colon cancer affects men and women equally. It is more common among people who are 50 years and older but can rarely occur in teenagers as well. Although some factors can increase the risk of colon cancer, over 75 percent of colon cancer occurs in people with no known risk factors. Risk factors for colon cancer are described below.