Macaroni alerting to Bed Bugs hidden in the outlet cover.
A very unfortunate case of bed bug bites. Bed Bug bite symptoms can include a slightly reddish lump, can also form a blister, but typically no red spot at the center like with fleas or black flies. Bites do often itch.
Severe reaction to the anesthetic and anticoagulant from bed bug bites. Bed Bug bites can look like this.
Picture of a Bed Bug. Adult bed bug and nymphs feeding on a human blood host.