Bedbugs, also known as ticks, psyllids, bedbugs, flatworms and so on. It belongs to Insecta, Hemiptera and bedbug, and is a group of insects with medical importance? . For an insect that is not completely abnormal? . Flat body, wide abdomen, oval, reddish brown, no monocular. The antenna has four segments. The beak has three segments, which are hidden in the lower sulcus of the head. The wings degenerate, leaving only traces of the front wing skin, sucking the blood of warm-blooded animals, moving at night and hiding in the cracks during the day.