I have severe rectal pain during periods while bowel movement and passing gas. Can u suggest remedy for this situation?
Rectal Pain. Many reasons could cause rectal pain such as hemorrhoids or anal fissures. You should see a gastroenterologist for a formal exam and possible anoscopy (endoscopic) evaluation.
Defecation syncope, Is what you are describing. Significant vagal nerve stimulus from painful defecation or heavy bearing down. This is due to the Insulin resistance syndrome, get checked for this and follow a low-glycemic index diet and get frequent, aerobic exercise. But why so much pain with defecation? You need to see a gastroenterologist to figure this part of it out.
Fissure. Severe anal pain caused by a bm which persists after is usually a fissure.