1.9K Reviews    |    4.7 Star Rating    |    20+ years of experience    |    72k+ Patients Treated

Diseases of Anus And Rectum

At GastroDoxs in Houston, board-certified Dr. Nghia Nguyen provides expert diagnosis, tailored care for conditions affecting the anus and rectum. From hemorrhoids and fissures to fistulas and abscesses, his team offers minimally invasive treatments to relieve pain and restore health.

Call Us 832-632-4070 Schedule Now Click Here Text Us 832-632-4070 Learn More Click Here
Texas Medical Board
Harris County Medical Society
American College of Gastroenterology
American Society for Gastrointestinal Endoscopy
Memorial hermann
Houston Methodist leading Medicine
HCA Houston Healthcare
Nghia Nguyen

About the Expert

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

  • Chronic constipation or diarrhea
  • Inflammatory bowel diseases (e.g., ulcerative colitis)
  • Heavy lifting or prolonged sitting
  • Pregnancy and increased pelvic pressure
  • Previous surgeries or trauma to the anal/rectal area

Signs and Symptoms

  • Bright red bleeding after bowel movements
  • Pain or burning sensation during defecation
  • Itching, irritation, or soreness around the anus
  • Swelling, lumps, or tenderness near the anal opening
  • Mucus discharge with stool

How Dr. Nghia Nguyen Diagnoses Diseases of the Anus and Rectum

Dr. Nguyen uses a thorough, step-by-step approach:

Medical History and Physical Exam

He reviews your symptoms, bowel habits, and any prior surgeries or injuries, then performs a focused physical exam.

Digital Rectal Examination

A gentle, gloved finger exam helps him feel for tenderness, lumps, tight sphincters, or swollen veins.

Anoscopy

Using a small, illuminated tube, he inspects the anal canal for hemorrhoids, fissures, or other lesions.

Endoscopic Evaluation

If deeper assessment is needed, Dr. Nguyen will recommend a colonoscopy to visualize the rectum and colon.

Imaging Studies

  • Endoanal ultrasound for detailed views of sphincter integrity, abscesses, or fistula tracts.
  • Pelvic MRI to map complex fistulas or detect deep-seated infections.

Additional Testing (when indicated)

Occasionally, anorectal manometry gauges muscle function or a targeted biopsy rules out rare conditions.

Dr. Nghia Nguyen
Treatment

Our Team offers a full range of care for diseases of the anus and rectum.

1. Lifestyle and Diet Modifications

  • Eat more fiber from fruits, vegetables, and whole grains
  • Increase daily water intake
  • Respond promptly to bowel-movement urges
  • Stay active—walking and regular movement aid digestion

2. Medications

  • Creams or suppositories to reduce swelling and ease pain
  • Stool softeners or gentle laxatives to facilitate bowel movements
  • Antibiotics when infection is present
  • Anti-inflammatory agents for underlying inflammatory bowel conditions

3. Minimally Invasive Procedures

  • Rubber band ligation for internal hemorrhoids
  • Injection therapy or infrared coagulation to shrink swollen tissue
  • Fistula plugs or seton placement to support healing
  • Balloon dilation for strictures or narrowing
  • Laser and video-guided techniques to reduce inflammation and repair tissue
Dr Nghia Nguyen

About the Author

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

What are some common conditions?

They include hemorrhoids, anal fissures, fistulas, abscesses, and inflammation like proctitis.

What symptoms should I look for?

Bright red bleeding, pain or burning during bowel movements, itching or soreness, swelling or lumps, and mucus with stool are all signs.

How is the diagnosis made?

Dr. Nguyen uses a detailed health history, a physical exam, a rectal exam, anoscopy, and sometimes imaging or colonoscopy to identify the issue.

What treatments are available?

Treatment options range from dietary and lifestyle changes to topical medications, antibiotics, and simple in-office procedures like banding, injections, or dilation.

Is surgery always needed?

No. Many patients improve with non-surgical approaches such as medications, lifestyle modifications, and minimally invasive therapies.

When should I see a doctor?

If you experience persistent pain, bleeding, swelling, or any signs of infection around the anus or rectum, seek medical attention promptly.

Can I prevent these problems?

Yes. Eating a high-fiber diet, staying well hydrated, avoiding straining during bowel movements, and regular exercise can help reduce risk.

Related Blogs
Abdominal Pain

Feel Like You Always Have Food Stuck in Your Throat? You May Have Dysphagia

Read More
Abdominal Pain

Dysphagia

Read More
Abdominal Pain

Lifestyle Adjustments to Manage Dysphagia

Read More