I took a summer job during college with a landscaping company. I had never had poison ivy in my life and had no idea how to identify it or what it could do to you. One day I was using a weedeater around a fence and ran it right through a very large patch of P. I. Did I mention that I was wearing shorts? I sprayed the stuff all over my legs, and continued to work.
The next day the rash started coming up and eventually everything between the knees and ankles was a giant, blistering, weeping mass. It took me three months of every treatment in the book to finally get rid of it, and I’ll have the scars for the rest of my life.