What can cause 10+ mos chronic abdominal pain? blood tests, barium swallow, gastroscopy, gallbladder all normal. no h. pylori. no diarrhea or vomiting

Several ideas: When a patient has persistent abdominal pain despite negative tests it suggests that either the patient has a less common condition that hasn't been considered or tested for OR that the symptoms aren't due to a physical illness. It is not unusual for patients to experience actual pain in various parts of their bodies from psychological causes. When the mind is treated the pain goes away.