Your small and large intestines normally work in a coordinated system of movement. If something interrupts these coordinated contractions, it can cause a functional intestinal obstruction. This is generally known as a nonmechanical obstruction. If it’s a temporary condition, it’s referred to as an ileus. It’s called a pseudo-obstruction if it becomes chronic, or long term.

Causes for ileus include:

abdominal or pelvic surgery

infections, such as gastroenteritis or appendicitis

some medications, including opioid pain medications

electrolyte imbalances

Intestinal pseudo-obstruction can be caused by: