Pelvic floor dyssynergia is one of the commonest subtypes of constipation, and the conventional treatment (dietary fibre and laxatives) is often unsatisfactory. Recently biofeedback training has been introduced as an alternative treatment. The authors review the evidence for this approach and conclude that, although controlled studies are few and open to criticism, about two thirds of patients with pelvic floor dyssynergia should benefit from biofeedback training
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