8. Iron-Deficiency Anemia
Sometimes colon cancer can cause slow blood loss that isn’t visible.
One consequence can be iron-deficiency anemia.
A person with anemia may experience:
- Fatigue
- Weakness
- Pale skin
- Headaches
- Dizziness
- Shortness of breath, particularly during activity
- Reduced ability to concentrate
Iron deficiency can result from many causes, including insufficient dietary iron, heavy menstrual bleeding, certain digestive disorders, and other sources of blood loss.
For this reason, anemia should be investigated rather than automatically attributed to cancer.
In some adults, unexplained iron-deficiency anemia may lead doctors to investigate the gastrointestinal tract to determine whether hidden bleeding is occurring.
Why Early Detection Matters
One reason colorectal cancer screening is so important is that colorectal cancer can sometimes develop from polyps.
A polyp is a growth that forms on the lining of the colon or rectum. Most polyps are not cancerous, but some types can gradually develop into cancer.
Screening can help detect certain polyps before they become cancerous.
Screening can also detect colorectal cancer at an earlier stage, sometimes before symptoms appear.
That is particularly important because early colorectal cancer may cause no obvious symptoms.
In other words, waiting for warning signs is not a substitute for recommended screening.
Who Should Consider Screening?
Screening recommendations depend on factors such as age, family history, personal medical history, and certain risk factors.
In many countries, routine colorectal cancer screening begins in middle age for people at average risk, but the exact starting age and recommended test can vary according to local guidelines.
People with a strong family history of colorectal cancer, certain inherited conditions, or particular gastrointestinal diseases may need to begin screening earlier or undergo screening more frequently.
If you are unsure when screening should begin for you, speak with a healthcare professional.
What Tests Can Detect Colorectal Cancer?
There is more than one screening method.
Depending on the individual’s circumstances and local recommendations, screening may include stool-based tests or visual examinations of the colon.
A colonoscopy is one commonly used test. During a colonoscopy, a healthcare professional uses a flexible instrument to examine the inside of the colon and rectum. If certain polyps are found, they may sometimes be removed during the procedure.
Other screening approaches may include stool tests that look for hidden blood or other signs associated with colorectal disease.
The best test depends on the individual, their risk level, medical history, availability, and the recommendations of their healthcare professional.
Risk Factors You Should Know
Certain factors can increase the risk of developing colorectal cancer.
These can include:
- Increasing age
- A personal history of colorectal polyps
- A personal history of colorectal cancer
- A family history of colorectal cancer
- Certain inherited genetic conditions
- Some forms of inflammatory bowel disease
- Smoking
- Heavy alcohol consumption
- Physical inactivity
- Being overweight or obese
- A diet high in processed meats
Having a risk factor does not mean you will develop cancer.
Likewise, people without obvious risk factors can still develop colorectal cancer.
That is why appropriate screening remains important.
What Can You Do to Reduce Your Risk?
No strategy can guarantee that a person will never develop colorectal cancer, but several lifestyle choices may support overall health and potentially reduce risk.
Eating a diet rich in vegetables, fruits, whole grains, and other sources of dietary fiber can support digestive health.
Regular physical activity is also beneficial.
Avoiding tobacco is important for overall cancer prevention, while limiting alcohol can reduce several health risks.
Maintaining a healthy weight and following recommended screening guidelines are additional steps worth considering.
These habits aren’t simply about preventing colon cancer. They can contribute to better cardiovascular, metabolic, and overall health as well.
Don’t Let Fear Stop You From Getting Checked
One of the biggest problems with health symptoms is that people sometimes avoid medical care because they are afraid of what they might discover.
But seeing a healthcare professional does not mean that you have cancer.
In fact, many symptoms associated with colorectal cancer are much more commonly caused by other conditions.
The purpose of medical evaluation is to find the actual cause.
A doctor may ask about your symptoms, medical history, medications, family history, diet, and bowel habits. Depending on what they find, they may recommend blood tests, stool testing, imaging, colonoscopy, or another examination.
Getting checked can provide reassurance when the cause is harmless and can lead to earlier treatment when a medical problem does require attention.
When Should You Seek Medical Advice?
Consider contacting a healthcare professional if you have a persistent or unexplained change in bowel habits, recurring blood in your stool, unexplained weight loss, ongoing abdominal pain, persistent fatigue, or another bowel-related symptom that concerns you.
You should seek urgent medical attention if you experience significant bleeding, severe or worsening abdominal pain, fainting, severe weakness, or symptoms suggesting a serious acute illness.
The right response depends on the severity and combination of symptoms.
The Bottom Line
Having constipation, diarrhea, abdominal discomfort, fatigue, or another digestive symptom does not mean you have colon cancer.
There are many possible explanations for these symptoms, and most people with occasional digestive problems do not have cancer.
However, persistent or unexplained changes deserve attention.
