A method of treating anal incontinence in a patient comprises providing a sling having a central portion and first and second arms, creating a subcutaneous tunnel between a first buttock incision and a second buttock incision in the patient, mechanically widening the subcutaneous tunnel to create a pocket for the central portion of the sling, grasping the first arm of the sling and pulling the sling through the subcutaneous tunnel such that the central portion of the sling rests underneath the ano-rectum, inserting an introducer needle through a first thigh incision formed in the patient and advancing the introducer needle through the first buttock incision, pulling the first sling arm through the first thigh incision, inserting the introducer needle through a second thigh incision formed in the patient and advancing the introducer needle through the second buttock incision, and pulling the second sling arm through the second thigh incision.