Anismus is a medical condition characterized by the inability to have a bowel movement. It can be caused by a variety of factors, including neurological disorders, pelvic floor dysfunction, or other medical conditions. Synonyms for anismus include functional constipation, obstructed defecation syndrome, outlet obstruction constipation, and pelvic floor dysfunction. These terms are often used interchangeably in medical literature and discussions, and all refer to the difficulty in passing stool. Treatment for anismus generally involves a combination of dietary changes, physical therapy, and medication. It's essential to see a healthcare professional to determine the underlying cause of anismus and receive appropriate treatment.