 [ Symptoms ] after a bowel movement abdominal pain puts me on my knees severe nausea to the point i do vomit [ Disease ] hi an welcome to question doctors com this us definitely ibs you might be having gastritis reflux esophagitis as water brash in your mouth is a sign stop fatty foods and avoid caffeine citrus fruits and acidic foods… take plenty of fibers and water probiotics helps … practice yoga and relaxation training