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Rectal Bleeding
Colon cancer is one of the leading causes of cancer-related deaths worldwide. Early detection through screening and awareness of risk factors—such as family history, age, diet, and lifestyle—can dramatically improve outcomes. For comprehensive information, visit the American Cancer Society: www.cancer.org/cancer/colon-rectal-cancer.
Dr. Nghia Nguyen, DO, is a board-certified gastroenterologist providing advanced digestive care in the Greater Houston area. He earned his medical degree from the Texas College of Osteopathic Medicine and completed both his Internal Medicine residency and Gastroenterology fellowship at the University of Texas at Rio Grande Valley. Dr. Nguyen specializes in treating conditions such as acid reflux, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and liver disorders.
Common Causes and Risk Factors
Hemorrhoids (swollen veins in the anus)
Anal fissures (small tears in the skin around the anus)
Irritable bowel syndrome (can exacerbate other conditions)
Colon polyps or colorectal cancer
Infections of the colon (bacterial, viral, or parasitic)
Older age or family history of colorectal problems
Certain medications (anticoagulants, NSAIDs)
Signs and Symptoms
Bright red blood on toilet paper, stool, or in the bowl
Dark, tar-like stools (melena)
Streaks of blood mixed with stool
Mucus in the stool
Pain or burning sensation during bowel movements
Itching or swelling around the anal area
Persistent diarrhea or constipation
Abdominal cramps or discomfort
How Dr. Nghia Nguyen Diagnoses This Condition?
Dr. Nguyen uses a step-by-step approach:
Medical History and Physical Exam
He reviews your symptoms in detail—frequency and appearance of bleeding, associated pain or burning, changes in bowel habits, and any family history of colon disease.
Endoscopic Evaluation
Anoscopy - Direct visualization of the anal canal and lower rectum to identify hemorrhoids, fissures, or other lesions.
Flexible Sigmoidoscopy - Examination of the distal colon for evidence of inflammation, polyps, or diverticula.
Colonoscopy - Complete inspection of the entire colon to detect polyps, cancer, or inflammatory bowel disease.
Laboratory and Stool Studies
Blood tests to assess for anemia, infection, or inflammatory markers. Stool tests to rule out infectious causes and detect occult blood.
Imaging (If Indicated)
Cross-sectional studies such as CT or MRI to evaluate deeper structures or complications when endoscopic findings are inconclusive.
Treatment
Our Team offers a full range of care for rectal bleeding at GastroDoxs.
1. Diet and Lifestyle Changes
Add fiber by eating fruits, vegetables, and whole grains
Drink plenty of water to help soften stool
Maintain a healthy weight to ease pressure on veins
Cut back on alcohol and caffeine to prevent irritation
2. Medications
Creams or suppositories to treat hemorrhoids and anal fissures
Anti-inflammatory medicine for inflammatory bowel disease (IBD)
Iron supplements for chronic blood loss
Antibiotics if an infection is identified
3. Minimally Invasive Procedures and Surgery
Rubber band ligation for internal hemorrhoids
Sclerotherapy injections to shrink hemorrhoids
Polyp removal during colonoscopy to prevent cancer
Surgery for hemorrhoids or fissures when other treatments fail
Dr. Nghia Nguyen, DO, is a board-certified gastroenterologist providing advanced digestive care in the Greater Houston area. He earned his medical degree from the Texas College of Osteopathic Medicine and completed both his Internal Medicine residency and Gastroenterology fellowship at the University of Texas at Rio Grande Valley. Dr. Nguyen specializes in treating conditions such as acid reflux, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and liver disorders.
Frequently Asked Questions
Is rectal bleeding always caused by cancer?
No. Most cases are caused by hemorrhoids or small tears. However, any bleeding should be checked.
Can hemorrhoids cause bright red bleeding?
Yes. Hemorrhoids often bleed during or after a bowel movement. The blood is usually bright red.
What if I see mucus with the blood?
Mucus and blood can mean you have inflammation, an infection, or a more serious condition like IBD.
When should I see a doctor?
If you notice blood, changes in bowel habits, or belly pain, schedule a visit. Early care helps prevent complications.
Can my diet really affect bleeding?
Yes. A high-fiber diet and drinking enough water can help stop bleeding caused by straining.
Does IBS cause bleeding?
Not directly. But IBS may make hemorrhoids or fissures worse, which can lead to bleeding.
What if I'm afraid of a colonoscopy?
Dr. Nguyen uses gentle methods and safe sedation. Most patients feel nothing during the exam.
