Blue dye could be key to Pain-Free hemorrhoid recovery

NCT ID NCT07164807

First seen Nov 01, 2025 · Last updated May 14, 2026 · Updated 31 times

Summary

This study tests whether adding different amounts of methylene blue (a dye with pain-relieving properties) to a standard local anesthetic (ropivacaine) can better control pain after hemorrhoid surgery. About 177 adults with severe hemorrhoids will receive the injection during surgery and report their pain levels over the next month. The goal is to find the best dose for reducing pain and improving recovery without increasing side effects.

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Contacts and locations

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • Affiliated Hospital of Putian University

    Putian, China

Conditions

Explore the condition pages connected to this study.