American Gastroenterological Association: Medical position statement on constipation (2013) American College of Gastroenterology: Clinical guidelines for the management of benign anorectal disorders (2021) Dyschezia Dyschezia (which also may be referred to as dyssynergia, disordered evacuation, dysfunction of pelvic floor or anal sphincters, or functional defecatory disorders) is difficulty defecating.