, allergy, aerophagia (air swallowing, a nervous habit), partial bowel obstruction, rapid gastric emptying (seen in motility disorders), splenic-flexure syndrome, PCOD and ovarian cysts, diverticulosis, gastritis, excessive acid production, hormonal or endocrine imbalances etc. Without an evaluation it would be difficult to differentiate between the causes. It would be best to get this evaluated by a primary care physician or a gastroenterologist for an accurate diagnosis and appropriate management.
Hope this helps.