What is the role blood flow in the pathogenesis of anal fissures?

Updated: Nov 09, 2018
  • Author: Bruce M Lo, MD, MBA, CPE, RDMS, FACEP, FAAEM, FACHE; Chief Editor: Barry E Brenner, MD, PhD, FACEP  more...
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Evidence suggests that blood flow to the anal canal and internal anal sphincter tone play a role in the development and healing of anal fissures. Decreased blood flow has been described in chronic, nonhealing fissures. Hypertonicity of the internal sphincter may also cause decreased blood flow in the area of a fissure. [6, 7, 8]

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