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Sclerotherapy

Sclerotherapy

Sclerotherapy involves injecting a sclerosing solution into hemorrhoidal tissue, causing it to scar down and shrink — one of the older office-based treatments for hemorrhoids, still used today particularly for early-grade internal hemorrhoids.

Key takeaways
  • A sclerosing agent is injected at the base of the hemorrhoid, above the dentate line, causing scarring that shrinks the tissue and reduces bleeding.
  • Comparative studies have found rubber band ligation generally more effective, though sclerotherapy remains a reasonable option, particularly for grade I hemorrhoids or patients who can’t tolerate banding.
  • Some post-procedure pain and, less commonly, bladder-related complications have been reported.

How it works

A sclerosing solution (historically phenol in oil, among other formulations) is injected submucosally at the base of the hemorrhoid, above the dentate line, using a proctoscope for visualization. This triggers an inflammatory response that leads to scarring, fixing the tissue in place and reducing its blood supply — a somewhat different specific mechanism from rubber band ligation’s direct strangulation of blood supply, but with a broadly similar end result.

What it’s used for

Sclerotherapy is generally used for grade I hemorrhoids (bleeding without significant prolapse) and can help with grade II prolapse as well, though it’s typically considered less effective than rubber band ligation for higher-grade disease.

How it compares to rubber band ligation

Comparative research has generally found rubber band ligation more effective for treatment response than sclerotherapy, though complication rates between the two are broadly similar. This doesn’t make sclerotherapy obsolete — it remains a reasonable choice in specific situations, including patients who may not tolerate banding well, or as an alternative when banding isn’t suitable for a particular presentation.

What to expect

The procedure itself is quick, done in the office without sedation. Some post-procedure discomfort or pain is commonly reported, generally milder and shorter-lived than pain following more invasive procedures. Less commonly, bladder-related complications (such as difficulty urinating) and localized infection have been reported.

Recovery

Recovery is generally quick, with most people returning to normal activities the same or next day, similar to other office-based procedures in this section.

When to see a doctor after the procedure

  • Significant or worsening pain rather than the mild discomfort typically expected
  • Difficulty urinating
  • Signs of infection (fever, spreading redness, worsening pain)
  • Bleeding beyond what was discussed as a normal, expected part of recovery
Want to see how this stacks up against other options directly? See Comparing office procedures: success rates, pain, recurrence.

This page is for general education. Whether sclerotherapy is appropriate for your specific hemorrhoids is a decision made with your doctor.