Shadow bug is an ant-shaped beetle with a body length of 0.6-0.8 cm and a black and orange head, chest and abdomen. Living under weeds and stones during the day, moving at night, with phototaxis, flying under the lamp after entering the room, being slapped or crushed when falling or resting under objects such as human body or desktop, and body fluids (pH=2) touching the skin or being taken to other places by the patted poisonous insects, causing contact dermatitis. ?