Colon Cancer in Young Adults: Symptoms, Warning Signs, and When to See a Doctor
Colon cancer—also known as colorectal cancer—has often been thought of as a disease that only affects older adults. But today, more young adults under 50 are being diagnosed than in past decades. While that may sound concerning, the important takeaway is this: colon cancer is one of the most preventable and treatable cancers when caught early.
Routine screening, healthy lifestyle choices, and paying attention to your body are the best ways to protect yourself.
Why Are Rates Rising in Young Adults?
While there is no single answer, research points to a mix of lifestyle and health factors, such as:
- Diets high in processed foods and low in fiber
- Sedentary lifestyles
- Obesity and metabolic changes
- Inflammatory bowel disease (Crohn’s or ulcerative colitis)
- Family history or genetic conditions
- Changes in gut health
It's also worth noting that young adults aren't usually thought of as at risk, so symptoms may be mistaken for more common issues like hemorrhoids or irritable bowel syndrome (IBS). As PIH Health gastroenterologist Alexander Kim DO, explains: It's important to bring these concerns to your doctor no matter how embarrassing you think they are. If you notice blood in your stool or have chronic constipation for more than a few weeks, talk to your doctor.
Symptoms to Watch For
Most young people won't experience colon cancer but being aware of the signs can help you catch problems early. These include:
- Blood in the stool (bright red or dark/black)
- Changes in bowel habits that last more than a few days
- Ongoing abdominal pain, cramping, or bloating
- Fatigue or weakness
- Unexplained weight loss
Even if symptoms are mild, if they persist, it's worth checking in with your doctor.
When to Get Checked
You should see a doctor if:
- You notice blood in your stool
- You have bowel changes lasting longer than 1–2 weeks
- You experience unexplained abdominal pain, fatigue, or weight loss
- You have a family history of colorectal cancer or polyps
If you're at higher risk, your doctor may recommend screening before age Dr. Kim adds: ;Persistent symptoms are your bodys way of telling you something isn't right. Let's find the cause and address it early.
Screening: The Best Prevention
The most effective way to prevent colon cancer is through screening. A colonoscopy not only finds cancer early, but it can also prevent it altogether by removing small growths called polyps before they turn into cancer.
The American Cancer Society recommends:
- Average-risk adults: Begin screening at age 45
- High-risk adults: Start earlier, based on your doctor’s guidance
Protecting Your Digestive Health
You can lower your risk by:
- Eating more fruits, vegetables, and whole grains
- Staying active
- Maintaining a healthy weight
- Limiting alcohol and avoiding smoking
- Knowing your family history and sharing it with your doctor
Colon cancer in young adults is on the rise, but the good news is that it’s often preventable and highly treatable when detected early. By practicing healthy habits, staying aware of the signs, and keeping up with regular screenings, you can take control of your colon health.
Alexander Hyunsung Kim DO
Alexander Kim DO is fellowship trained in both gastroenterology and interventional endoscopy—a specialty that includes minimally invasive procedures to diagnose and treat GI conditions. Dr. Kim’s passion for helping others and making a positive impact in their lives led him to pursue a career in medicine. “I feel a strong sense of responsibility for contributing to society and serving the community through medical care,” he explains. “Medicine satisfies my intellectual curiosity, and I enjoy continually learning and growing.” Through a combination of specialized training, dedication to continuous learning, patient-centered care, experience, and passion for advancement, Dr. Kim has earned distinction in his specialty. During residency, he became chief resident, an experience that honed his leadership and mentoring skills. He previously served as director of a thriving and collaborative endoscopy practice, where he worked successfully to elevate standards of patient care across the organization through improvement initiatives and policy development. Dr. Kim is passionate about athletics and participates in long-distance running and basketball pick-up games. He and his family also enjoy experiencing diverse cultures through traveling and sampling world cuisines.
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