aerophagia

Chronic burping is caused by constant, unconscious air swallowing, often from anxiety (hyperventilating increases the amount of air we swallow, thereby increasing gas).

With your mouth closed, inhale slowly through your nose (expanding your abdomen--not your chest), then slowly exhale through your mouth (this helps to prevent air swallowing and hyperventilation and seeks to stimulate the vagus nerve to pass gastric contents "downstream").

Eating quickly can cause air swallowing that leads to bloating.

Infants' MYLICON(R) drops are sold over-the counter, in retail stores and pharmacies, as an anti-gas medicine to relieve the discomfort of infant gas frequently caused by air swallowing or by certain formulas or foods.

If air swallowing, diet, and lax abdominal rectus muscles have been ruled out as the source of your problems and your tests have failed to reveal any abnormality, you may think or may be told "nothing is really wrong with you".