Most people may first see a general healthcare provider (who may be a general practitioner, family care nurse, or family care physician) about a fissure or a fistula. For an uncomplicated fissure, most treatment is done at home with conservative care, which a general healthcare provider can oversee. For a complicated fissure or a fistula, a consultation with a gastroenterologist and/or a colorectal surgeon will be needed to get more specialized care.