Anismus is also known as pelvic floor dyssynergia and paradoxical puborectalis contraction. In this condition the external sphincter and pelvic floor muscles contract instead of relax when a person is trying to have a bowel movement. This often results in constipation and sometimes pain. In most of these cases, a pelvic floor physical therapist helps the patient to retrain their muscles to relax while having a bowel movement. Patients are also taught about toileting positions and techniques to facilitate more relaxed pelvic floor.