What are the symptoms of small intestinal bacterial overgrowth (SIBO)?

Doctor's Answer

Photo of Dr Wai Leong Quan
Dr Wai Leong Quan

Gastroenterologist

Symptoms of SIBO

The symptoms of SIBO are generally vague and may overlap with that of irritable bowel syndrome (IBS).

These include:

  • bloating
  • flatulence
  • abdominal pain
  • poor appetite
  • nausea
  • diarrhoea

In severe cases, SIBO may cause weight loss and the disturbances may affect your mood, your sleeping pattern and work.

Diagnosing SIBO

Although clinical breath tests are available to help confirming the diagnosis of SIBO, there are significant confounding factors which may affect the test results.

Response to treatment may also varies widely from individual to individual thereby limiting their value in the overall management of the condition.

As many of the symptoms are not specific to SIBO further investigations may also be required at times to exclude other concurrent conditions.

Dr Quan

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