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Abdominal Pain

Abdominal pain, which can range from dull discomfort to sharp cramps, affects many individuals. At GastroDoxs in Houston, board-certified gastroenterologist Dr. Nghia Nguyen provides comprehensive evaluation, diagnosis, and personalized treatment plans to address causes like indigestion, IBS, gallstones, and more.

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Texas Medical Board
Harris County Medical Society
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American Society for Gastrointestinal Endoscopy
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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.

What Is Abdominal Pain?

  • Discomfort felt anywhere between the chest and pelvis
  • May present as a dull ache or sharp, cramp-like pains
  • Can be localized to one spot or spread across the belly

Common Causes and Risk Factors

  • Indigestion or excess gas
  • Stomach infections (e.g., stomach flu)
  • Acid reflux, gastritis, or peptic ulcers
  • Gallstones or kidney stones
  • Irritable bowel syndrome (IBS)
  • Appendicitis or diverticulitis
  • Ovarian cysts, menstrual cramps, or ovulation pain
  • Risk factors: family history of digestive disorders, high-fat diet, stress, certain medications

Signs and Symptoms

  • Sharp or dull pain in one area
  • Cramps that come and go
  • Bloating or a sense of fullness
  • Nausea, vomiting, or diarrhea
  • Pain worsens after eating or with movement
  • Fever or chills
  • Blood in stool or vomit

How Dr. Nghia Nguyen Diagnoses?

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

Medical History and Symptom Review

She asks detailed questions about your pain—when it began, how long it lasts, its quality (burning, gnawing, sharp), any relation to meals, and associated symptoms like heartburn or nausea. She'll also review your medications (NSAIDs, aspirin), alcohol use, prior ulcers or reflux history, and family digestive disorders.

Physical Examination

Dr. Nguyen performs a focused abdominal exam, applying gentle pressure over the epigastric area to check for tenderness, rebound, or guarding. he may also assess for signs of gallbladder disease (Murphy's sign) and listen for bowel sounds.

Laboratory Tests

  • Complete blood count (CBC) to look for infection or anemia.
  • Pancreatic enzymes (amylase, lipase) to rule out pancreatitis.
  • H. pylori testing (breath, stool antigen, or serology) if ulcers are suspected.
  • Liver function tests to evaluate biliary or hepatic causes.

Imaging Studies

  • Abdominal ultrasound to evaluate the gallbladder, bile ducts, liver, and pancreas.
  • CT scan of the abdomen if pancreatitis, masses, or vascular issues are a concern.

Endoscopic Evaluation

If peptic ulcer disease, gastritis, GERD, or non‐cardiac chest pain is suspected, Dr. Nguyen may perform an upper endoscopy (EGD). This allows direct visualization of the esophagus, stomach, and duodenum and the ability to biopsy lesions or treat bleeding ulcers.

Advanced Testing (if needed)

For refractory symptoms or atypical presentations, further tests such as 24-hour pH monitoring, gastric emptying studies, or MRI/MRCP may be ordered to pinpoint motility disorders, bile reflux, or structural abnormalities.

Dr. Nghia Nguyen
Treatment

Our Team offers a full range of care for abdominal pain.

1. Diet and Lifestyle Tips

  • Eat smaller meals more often to ease digestion
  • Avoid spicy, fatty, or fried foods that can trigger discomfort
  • Limit caffeine and alcohol to reduce irritation
  • Stay hydrated with water and clear liquids
  • Keep a food diary to identify and eliminate personal triggers
  • Incorporate stress-relief practices like walking, deep breathing, or yoga

2. Medications

  • Antacids or H₂ blockers for heartburn and acid reflux relief
  • Antibiotics when a bacterial infection is diagnosed
  • Antispasmodics to calm intestinal cramping in IBS
  • Acetaminophen for mild, general abdominal discomfort
  • Prescription therapies to improve digestion or reduce inflammation

3. Minimally Invasive or Advanced Procedures

  • Endoscopy or colonoscopy to inspect and treat ulcers, polyps, or inflammation
  • Laparoscopic surgery for conditions like appendicitis, hernias, or gallbladder removal
  • ERCP (Endoscopic Retrograde Cholangiopancreatography) for bile duct issues
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 is the ICD-10 code for abdominal pain?

The general code is R10.9. Upper left abdominal pain is listed under R10.11.

When should I see a doctor?

See a doctor if your pain is severe, lasts more than a day, or comes with fever, vomiting, or blood.

Can diet changes really help?

Yes. Eating simple meals and avoiding trigger foods can reduce or prevent pain.

Is upper left belly pain serious?

Sometimes. It could be from gas, your spleen, or other causes. Dr. Nguyen can help find the exact source.

What causes lower belly pain in females?

It may be from menstrual cramps, ovarian cysts, IBS, or other digestive issues. Treatment depends on the diagnosis.

Are the procedures safe?

Yes. Most tests and treatments—like endoscopy or laparoscopy—are minimally invasive, low-risk, and have quick recovery times.

Does insurance cover this care?

Most insurance plans cover visits, tests, and treatments. Our staff can verify your benefits and help with pre-authorization.

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