You might be out for a stroll in the park with your kids. Or maybe enjoying an afternoon on the golf course. That outdoor fun, though, sometimes comes with a price -- an itchy rash from pests you can't even see. They're called chiggers -- bugs so small you need a magnifying glass to spot them. They aren't dangerous, but their bites can leave you with a powerful urge to scratch. Don't let them get the best of you! Learn how to soothe your irritated skin and find out how to prevent bites the next time you go outside.

What Are Chiggers and Where Do They Lurk? Scientists call these creatures "trombiculid mites." But they have a bunch of nicknames. You might hear people call them harvest mites, harvest bugs, harvest lice, mower's mites, or red bugs. Technically, these critters aren't insects. They're "arachnids," in the same family as spiders and ticks. You can travel across the globe, but you can't escape these pests. Chiggers live in every country. Their favorite spots are moist, grassy areas like fields, forests, and even your lawn. You can also find them near lakes and streams. Adult chiggers don't bite. It's the babies, called larvae, that you have to watch out for. They're red, orange, yellow, or straw-colored, and no more than 0.3 millimeters long. After they hatch from eggs, the babies don't fly and don't travel very far on their own. They tend to stay clumped together in large groups on leaves and grass, usually less than a foot off the ground, and attach to animals or people as they pass by. In the U.S., chigger bites are most common in the late spring, summer, and early fall. The bugs are active when the ground temperature is between 77 and 86 degrees F, and they die when it gets colder than 42.