R-CPD: the inability to belch
Retrograde cricopharyngeal dysfunction, or R-CPD, is a condition in which a person cannot belch. It is under-recognised, often lifelong, and treatable.
What it is
The cricopharyngeus is a ring of muscle at the top of the oesophagus. It stays closed most of the time and opens to let food down. Normally it also relaxes briefly to let swallowed air back up as a belch. In R-CPD it does not relax in that direction, so air is trapped.
Symptoms
- inability to belch, often for as long as the person can remember
- gurgling or croaking noises from the throat and chest
- bloating and abdominal pressure, worse after meals and fizzy drinks
- excessive flatulence
- difficulty vomiting
How it is diagnosed
The diagnosis is mainly clinical: the history is characteristic. Examination helps exclude other causes, and further tests are used when the picture is atypical.
Treatment
Treatment is a botulinum toxin injection into the cricopharyngeus muscle, which allows the belch reflex to establish. The full pathway, including the short visit many international patients need, is on the R-CPD / No-Burp Program page.
Medically reviewed by
Associate Professor Necati Enver, MD
Laryngologist · Founder and Director, Istanbul Voice Center · Reviewed September 2026
General information only. It does not replace an individual assessment. Medical disclaimer
Frequently asked questions
Why can't I burp?
In retrograde cricopharyngeal dysfunction, the muscle at the top of the oesophagus does not relax to let air escape upward. Air that should leave as a belch is trapped, causing pressure, bloating and gurgling.
Is R-CPD rare?
It was characterised relatively recently and is under-recognised rather than rare. Many people with R-CPD have never been told that the problem has a name.
How is R-CPD treated?
With a targeted botulinum toxin injection into the cricopharyngeus muscle. See our R-CPD / No-Burp Program for the full pathway.
Need a specialist voice or laryngeal evaluation?
Tell us briefly what is happening. We reply with the next step, usually within one business day.