Leech therapeutic applications

Hematophagous animals including leeches have been known to possess biologically active compounds in their secretions, especially in their saliva. The blood-sucking annelids, leeches have been used for therapeutic purposes since the beginning of civilization. Ancient Egyptian, Indian, Greek and Arab physicians used leeches for a wide range of diseases starting from the conventional use for bleeding to systemic ailments, such as skin diseases, nervous system abnormalities, urinary and reproductive system problems, inflammation, and dental problems. Recently, extensive researches on leech saliva unveiled the presence of a variety of bioactive peptides and proteins involving antithrombin (hirudin, bufrudin), antiplatelet (calin, saratin), factor Xa inhibitors (lefaxin), antibacterial (theromacin, theromyzin) and others. Consequently, leech has made a comeback as a new remedy for many chronic and life-threatening abnormalities, such as cardiovascular problems, cancer, metastasis, and infectious diseases. In the 20(th) century, leech therapy has established itself in plastic and microsurgery as a protective tool against venous congestion and served to salvage the replanted digits and flaps. Many clinics for plastic surgery all over the world started to use leeches for cosmetic purposes. Despite the efficacious properties of leech therapy, the safety, and complications of leeching are still controversial.

Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.

Hematophagous animals including leeches have been known to possess biologically active compounds in their secretions, especially in their saliva. The blood-sucking annelids, leeches have been used for therapeutic purposes since the beginning of civilization.

Explore how this research connects to clinical practice

More peer-reviewed studies in Clinical Trials.

• Leech Therapy for Knee Osteoarthritis — The Landmark RCT — Michalsen et al. (2003)
• Leech-Assisted Flap Salvage — Systematic Review of 277 Cases — Whitaker et al. (2012)
• Institutional Outcomes in Leech-Assisted Microsurgery — 87 Patients — Cornejo A et al. (2017)
• Leech Therapy for Knee OA — Confirmatory RCT — Andereya S et al. (2008)
• Leech Therapy for OA — Systematic Review and Meta-Analysis — Lauche R et al. (2014)
• Leech Therapy for Thumb Osteoarthritis — RCT — Michalsen A et al. (2008)
• BRIGHT-4 Trial — Bivalirudin vs Heparin by BMI — BRIGHT-4 Investigators (2025)
• Aeromonas hydrophila Infections Following Leech Use in Flap Surgery — Lineaweaver WC et al. (1992)
• Leech Therapy for Lateral Epicondylitis — RCT — Michalsen A et al. (2014)
• Leech Therapy in Flap Salvage — Timing and Practical Recommendations — Herlin C et al. (2017)