Lidocaine is the most commonly prescribed topical anaesthetic for anal fissures. Journal List Afr Health Sci v. Non-surgical treatment: Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Learn More about DR. Medical uses for the toxin are blepharospasm, strabismus, spasmodic torticollis, spastic cerebral palsy. Curr Med Res Opin. Relationship between anal pressure and anodermal blood flow. Medical and surgical treatment of chronic anal fissure: Pain is due to tenderness of the fissure itself and to intense spasm of the internal anal sphincter muscle. A new therapeutic approach for chronic anal fissures. It can also help reduce the pressure in the anal canal, which should ease the pain. Brin MF. Beck DE, editor. Aliment Pharmacol Ther. Colon, Rectum and Anus. Figure 2.