[header] How to kill leeches [title] Try to detach the leech's suckers. [step] Locate the leech's oral sucker on the anterior (thinner end). Place your finger or fingernail on the skin next to this, and gently slide it underneath. 
Push to the side to detach the leech. Repeat this step at the posterior end sucker, then flick the leech off of your body.