How can you tell the difference between bed bug bites and chigger bites?

Chigger's bites: Often have a small red in the center of a welt & occur in areas where skin is tender like the crotch, armpits, belt line, backs of knees, ankles. They are extremely itchy. Bed bug bites may cause no sx's/signs in some except for 2 small points where skin was punctured by bedbug. When there's a reaction, it may show from an hour to several days after bite. It can cause itchy, pink, swollen, lesion.