['To define the role of biofeedback in fecal incontinence and constipation.', 'A case series of patients with fecal incontinence or constipation with pelvic floor dysfunction.', 'Tertiary care center with an anorectal physiology laboratory.', 'Patients with 1 of the following: (1) chronic or acute fecal incontinence, (2) fecal incontinence and neurologic injury, or (3) constipation with pelvic floor dysfunction.', 'Electromyogram-guided biofeedback retraining of the pelvic floor.', 'Resolution of electromyographic abnormalities and subjective resolution of fecal incontinence or constipation.', 'Of the patients with fecal incontinence, 92% experienced significant improvement with biofeedback without significant improvement in electromyographic values. Of the patients with constipation and pelvic floor dysfunction 80% experienced improvement with biofeedback without significant change in electromyographic values.'] Is biofeedback effective therapy for fecal incontinence and constipation?