Diagnostic tests may include:
• Barium enema
• Blood tests
• Colonoscopy
• Electromyography (EMG)
• Rectal or pelvic ultrasound
• Stool culture
• Test of anal sphincter tone (anal manometry)
• X-ray procedure using a special dye to evaluate how well the sphincter contracts (balloon sphincterogram)
• X-ray procedure using a special dye to see the bowel while you have a bowel movement (defecography)