Anal fissure

	Anal fissure Microchapters
Home
Patient Information
Overview
Historical Perspective
Classification
Pathophysiology
Causes
Differentiating Anal Fissure from other Diseases
Epidemiology and Demographics
Risk Factors
Screening
Natural History, Complications and Prognosis
Diagnosis
History and Symptoms
Physical Examination
Laboratory Findings
Abdominal X Ray
CT
MRI
Ultrasound
Other Imaging Findings
Other Diagnostic Studies
Treatment
Medical Therapy
Surgery
Primary Prevention
Secondary Prevention
Cost-Effectiveness of Therapy
Future or Investigational Therapies
Case Studies
Case #1
Anal fissure On the Web
Most recent articles
Most cited articles
Review articles
CME Programs
Powerpoint slides
Images
American Roentgen Ray Society Images of Anal fissure All Images X-rays Echo & Ultrasound CT Images MRI
Ongoing Trials at Clinical Trials.gov
US National Guidelines Clearinghouse
NICE Guidance
FDA on Anal fissure
CDC on Anal fissure
Anal fissure in the news
Blogs on Anal fissure
Directions to Hospitals Treating Anal fissure
Risk calculators and risk factors for Anal fissure

	Anal fissure;
ICD-10	K60.0-K60.2
ICD-9	565.0
DiseasesDB	673
MedlinePlus	001130

For patient information click here

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

An anal fissure is an unnatural crack or tear in the anus skin. As a fissure, these tiny tears may show as bright red rectal bleeding and cause severe periodic pain after defecation.^[1] The tear usually extends from the anal opening and located posteriorly in the midline. This location is probably because of the relatively unsupported nature of the anal wall in that location.