The best position for using an enema is lying on the left side with the knees bent, according to WebMD. Another good position is kneeling with the head lowered and the left side of the face resting on a flat surface.
Once in position, the user inserts the tip of the enema bottle into the rectum using a gentle side-to-side motion with the tip pointing toward the navel, advises WebMD. The user must never force the tip inside the rectum, as this can result in physical injury. Once inserted, the user squeezes the bottle to dispense the recommended amount of enema solution and remains in position for up to five minutes or until a bowel movement occurs.