By Geoff Olson
More of a tourist than a traveller, I’m standing on an outcropping of volcanic rock in the Caribbean, scratching away at my archipelago of bug bites. My guide Calvin, a relaxed fellow with dark skin and blue eyes, notices my agitation and stoops to pluck leaves from a nearby plant used as a local medicine for wounds. He shows me how to apply sap from the leaf’s stem. Using my other bites as a control group, I wait to see if the itching stops in the applied area. It seems to work.
