My SO has been getting some raised / swollen areas on her heel / foot, and one on her pinky finger, beginning four days ago. We believe they are bites, but the source eludes us. She's extremely sensitive to tactile stimuli, so ordinarily she would notice say, a mosquito or similar. At first we suspected the dreaded--shhhh!--bedbug
but these bites are occurring during the day, and an exhaustive search (including stripping the bed and laundering everything) turned up nothing.
The bites are extremely itchy at first, swell quickly like a mosquito bite, then recede, except in one case, in which the bite receded somewhat, then blistered, filling with clear liquid (lymph? plasma?).
The size of the bites vary, but they generally range from 5-15 mm in diameter, and the high point of the swelling is perhaps 3 or 4 mm.
and here here
We have an indoor cat, who hasn't been particularly itchy or scratchy--we combed her today, also turned up nothing. If it were fleas, we would see them. Likewise with bedbugs or spiders (but which, under different circumstances, would fit certain diagnostic criteria for bites of this nature).
I vacuumed the other day, and we have regular high-traffic wall-to-wall carpet, which I just crawled over with a high-powered flashlight, literally prying apart the nap to examine. Nothing.
Interestingly, she has gotten several "bites" like this recently, I have been in all the same places, and I have not received a single one. She does not use any skin lotion or any attractant we can identify (no perfume, etc).
She just brushed against the shower curtain five minutes ago, and the one on her pinky "reactivated" and is now itchy again.
We live in a rented condo, have been here for four years, and nothing like this has happened in the past.
We are in upstate New York.