Some species of crickets bite humans, but most don't. The insects aren't aggressive, and their jaws usually are not powerful enough to pierce the skin. Most cricket species in the United States do not attempt to bite.
Crickets are omnivores with jaws that are able to chew through many common items, such as cardboard or clothing. They only bite to defend themselves. The species that bite can deliver painful pinches to victims. People can avoid cricket bites by loosely holding the insect in one hand and giving it room to move. Treating a cricket bite with an antibacterial ointment can help prevent infection.