Chiggers.

Chigger infestations are caused by mite larvae that feed on the host's epidermal cells. The combination of digestive enzymes secreted by the mite and the immune response of the host produces the typical "chigger bite." Intense pruritus is the usual response, but more severe reactions and chigger-borne disease may also occur. Treatment is primarily symptomatic and consists of antipruritics, antihistamines and steroids. Chigger infestation may be minimized by the use of proper clothing and insect repellents.