top of page

Functional Disorders
IBS, functional dyspepsia, SIBO, breath testing, and post-infectious syndromes


Still bloated after a normal colonoscopy and blood tests?
Normal colonoscopy and bloods, still bloated? Gastroenterologist Dr Jeffrey Tu explains the four types of persistent bloating - Backed-up, Balloon belly, Fermenter and Slow stomach - and how each is tested and treated.
Jeffrey Tu
6d6 min read
Functional Dyspepsia: When Your Upper Gut Hurts and the Tests Come Back Normal
The burning, the bloating, the uncomfortable fullness that descends with every meal — these are the hallmarks of dyspepsia, a word derived from the Greek for "bad digestion." For millions of Australians, these upper gut symptoms are a daily reality. Most assume they have reflux, reach for an antacid, and never look deeper. But for a significant proportion of people — perhaps as many as one in ten adults — the symptoms are not explained by reflux, ulcers, or any visible abnorm
Jeffrey Tu
Apr 37 min read
Faecal Calprotectin: What This Simple Test Reveals About Your Gut
Every year, thousands of Australians are reassured that there is nothing seriously wrong with their bowel. The cramping, diarrhoea, bloating, and urgency disrupting their daily lives are often attributed to irritable bowel syndrome (IBS). This is a functional condition that is uncomfortable but not dangerous. For many, this reassurance is accurate and appropriate. However, for a significant number of patients, the symptoms labelled as IBS may actually indicate the early or ac
Jeffrey Tu
Mar 296 min read
Post-Infectious IBS: When the Infection Is Gone But the Gut Won't Recover
You had a food poisoning episode overseas — perhaps in Bali, Vietnam, or India. Or a bout of Giardia picked up from a contaminated water source on a camping trip. Or perhaps it was Dientamoeba fragilis, the gut parasite that took months to diagnose and weeks to treat with targeted antibiotic therapy. Whatever the cause, your doctor confirmed the infection has cleared. The pathology results are negative. The parasites are gone. And yet, weeks or months later, you are still blo
Jeffrey Tu
Mar 286 min read
SIBO: The Hidden Cause of Your Bloating
Your abdomen expands like a balloon after every meal. You look six months pregnant by dinner time, regardless of what you eat. The gas is relentless, the cramping unpredictable, and your bowel habits swing between diarrhoea and constipation without any discernible pattern. You have tried the low-FODMAP diet, probiotics, digestive enzymes, and every supplement your naturopath recommended. Nothing has made a lasting difference. If this sounds familiar, there is a strong chance
Jeffrey Tu
Mar 215 min read
bottom of page
