Overview
Functional abdominal pain syndrome (FAPS) is daily or near-daily abdominal pain that is not explained by another condition. It results from altered processing of normal gut sensations by the central nervous system — gut signals that are normally ignored become painful. NOT "imaginary" or "in your head" — it is a real disorder of nerve sensitivity.
Symptoms
Daily or near-daily abdominal pain
Often constant, may have peaks
Not clearly related to meals or bowel movements (distinguishes from IBS)
Often associated with fatigue, sleep problems, anxiety, depression
Substantial impact on work and social life
Self-Care Tips
Regular sleep — disrupted sleep amplifies pain.
Daily exercise — even 30 minutes walking reduces visceral pain.
Mindfulness, prayer, meditation, yoga.
Pace activities — don't over-exert on good days.
Address depression/anxiety if present.
When to See a Doctor
Seek medical care promptly if you notice: New severe pain; Weight loss, bleeding, fever.
Why it happens
Visceral hypersensitivity — the gut's nerve signals are amplified in the spinal cord and brain. Often follows: gastroenteritis, abdominal surgery, life stressors, anxiety/depression. Genetic predisposition.
How common it is
Affects ~2% of adults. More common in women, often begins after major life events, prior infections, or surgery.
How it is diagnosed
Diagnosis is clinical (Rome IV criteria) plus exclusion of structural disease. Limited testing once initial workup negative — repeat scans cause harm without yielding new info.
Lifestyle and daily habits
Daily habits and stress management work alongside medication.
• Regular sleep — disrupted sleep amplifies pain.
• Daily exercise — even 30 minutes walking reduces visceral pain.
• Mindfulness, prayer, meditation, yoga.
• Pace activities — don't over-exert on good days.
• Address depression/anxiety if present.
Diet
Diet has limited role.
• Standard healthy diet.
• Track if specific foods worsen — but avoid restrictive elimination diets without dietitian guidance.
Medicines
Neuromodulators are first-line — they desensitize the gut nerves.
• Tricyclic antidepressants (amitriptyline 10-50 mg at bedtime) — first-line. Improves pain in 60-70%.
• SNRIs (duloxetine 30-60 mg daily) — alternative.
• Pregabalin or gabapentin for neuropathic pain component.
• AVOID opioids — make functional pain worse over time.
Procedures and surgery
Brain-gut behavioral therapies have strong evidence.
• Cognitive Behavioral Therapy (CBT) for chronic pain.
• Gut-directed hypnotherapy — substantial evidence.
• Mindfulness-based stress reduction.
• Pain management specialist referral for refractory cases.
Outlook
Lifelong condition for many but very treatable. Combination of neuromodulators + brain-gut therapy + lifestyle improves quality of life dramatically. The key is shifting from "find a structural cause" to "treat the nervous system".
Questions to ask your doctor
• Have all serious causes been ruled out — and is more testing helpful?
• Could a low-dose tricyclic help me?
• Can I get gut-directed CBT or hypnotherapy?
Source and review
This guide comes from the Saudi Gastroenterology Association (SGA) patient library, prepared by the SGA Patient Education Panel. Last reviewed: 2026-04-24. It is for education and does not replace your doctor's advice.
Frequently Asked Questions
What is Functional Abdominal Pain?
How is Functional Abdominal Pain diagnosed?
What is the outlook for Functional Abdominal Pain?
When should I see a doctor about Functional Abdominal Pain?
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