When conservative treatment fails, surgery may be an option. Both sacral nerve modulation and anal bulking injections is minimal invasive surgical alternatives. Step one in SNM is a trial period of temporary stimulation. If the test is successful, the patient can have an implantable stimulator (step 2). Transanal submucosal bulking injection of collagen is also a possible treatment option and can be an effective treatment for faecal incontinence.