1 handful salt
If you happen to emerge from a refreshing dip in a freshwater swimming area with a few leeches stuck to your skin, a sprinkle of salt is all you need to get them to release their grip . They release a powerful anesthetic when attaching themselves to your skin, so your not likely to feel a lot of pain, but to prevent infection, you should follow up with a regular first aid as you would an ordinary cut or scratch.