The chigger's mouth and feeding structures are delicate and are best able to penetrate the skin at area
s of wrinkles, folds, or other area
skin that are thin. Most bites occur around the ankles, the crotch and groin area
s, behind the knees, and in the armpits. Barriers to migration on the skin such as belts may be one reason that chigger bites also commonly occur at the waist or at other area
s where their migration is prevented by compression from clothing.