Are there any risks or hazards when using leeches?

Yes, using leeches can pose several risks and hazards, including the potential for infection at the bite site, allergic reactions, and excessive bleeding due to the anticoagulants present in their saliva. Additionally, there is a risk of contamination if the leeches are not sourced from a sterile environment. Proper medical supervision and hygiene practices are essential to minimize these risks during therapeutic use.