A little boy picked up one of these caterpillars. He also let it crawl all over his hand. A few minutes later, the boy's dad noticed that his son had a red rash all over his neck and face.
The caterpillar has poison glands. When the caterpillar is provoked, it excretes venom. This venom can trigger an allergic reaction in some people. The good news is that ice and lotion can treat the allergic reaction.