What is the first-line treatment for an anal fissure?

• A. Topical nitroglycerin
• B. Surgery
• C. Oral antibiotics
• D. High-fiber diet

Answer: (A)

The first-line treatment for an anal fissure is the use of topical nitroglycerin. This medication works by causing relaxation of the anal sphincter, which can help reduce the pain associated with the fissure and promote healing by increasing blood flow to the area. The primary benefits of this approach include reducing sphincter tone, alleviating pain during bowel movements, and allowing for better healing of the fissure.

While dietary modifications, such as a high-fiber diet, can be beneficial as an adjunct therapy to prevent constipation and straining during bowel movements, they do not directly address the immediate symptoms or help with the healing of the fissure itself. Surgery is generally considered only when conservative treatments fail, making it a secondary option rather than the first line. The use of oral antibiotics is not indicated, as anal fissures are not typically caused by infections that would require such treatment. Thus, starting with topical nitroglycerin aligns with the goal of relieving pain and promoting healing effectively.