How common is fecal vomiting when severely constipated?

More fibers in food.: There is nothing like fecal vomiting. It does not happen. You must be vomiting partially digested food that itself can be smelly. Have you ever had your constipation checked out? This needs to be treated to get rid of the problem. Usually it is due to lack of fiber in the food. Eat more of salads, vegetables, and fruits. You may also use something like metamucil or citrucel to increase your fiber.