Bed bug bites visible hours after feeding

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Bed bug bites visible hours after feeding
Bed Bug Bites

Image by louento.pix
Bed bugs will crawl along hairs and crawl down to skin surface to feed. Hours after bed bug feeding, red marks appear at site of each bite. Welts had preceded the red marks but first disappear. Red marks severity lessens with age and in a week are gone. Microscopic brownish areas remain but are very difficult to clearly see.

Bed Bug Immediate Bites after 30 min
Bed Bug Bites

Image by Armed Forces Pest Management Board
Photographer: Dr. Harold Harlan