What's biting me?

For the past several months, every few days, I notice a new itchy red mark that looks like an insect bite somewhere on my body. It gets maybe 1/3" at most and is slightly raised and very itchy, with irregular edges and no center point. It starts out skin color, then pale pink, then over the next day or two itches less and turns dark red/purple, then fades quickly. I can’t figure this out.
It’s never more than one bite at a time. It always happens when I’m in bed. It’s never happened on my face, but anywhere else is fair game. Today’s is in a joint that’s usually not open to the air, so I have no idea how whatever got me got there. Sometimes the bites are where clothes are and sometimes not.
I just replaced my mattress and box spring, and there is no sign of bedbugs on the old ones, nor have I ever seen any sign of any sort of insect in my room regularly. I don’t see spiders either. I don’t have pets, so no fleas.
What’s going on, and how do I stop it?

Several years ago I was having issues with staff infections, some of them would go into full blown boils. Maybe yours is not such a virulent strain?? If yours is the same as mine there is a quick test. Use a very hot wash cloth as hot as you can stand it and just cover the red mark, rotate the wash cloth a 15 sec or so for a couple of minutes. Thsi would stop mine instantly and it would go back to normal. If it has no effect you have something else going on.

How do you know they are bites, and not some kind of rash?

I don’t, but they look and act like other insect bites I’ve had. A tiny repeated spot rash seems a little odd. I am not allergic to anything, nor am I otherwise ill.

Its clearly , obviously , an insect that sucks blood and so puts an anti-coagulant in.
Its bed bugs , no ifs or buts, based on that description.
( I am not a doctor, but the lump and then turning red… thats one long lasting anti-coagulant the insect injected !)
You ruled out bed bugs ONLY because you cannot find them in your bed.

These bed bugs are evolving … maybe he climbs up from the floor.

Bed bugs hid when not feeding and are very often hard to find. They may be in cracks such as between the wall and baseboard. They can also be in places like between books or inside furniture.

Fleas usually stay on the body and leave dirt which is really excreted blood. Flea crap, if you will.

Given your description, I’d really worry about bed bugs.

But would I only have the one bite at a time? Can I have just one bug? Wouldn’t I see some evidence- dropping stains, etc?

It’s possible to have fleas bites, even if you don’t have pets. We used to occasionally bring fleas in from the neighbor’s outdoor cats. They die off quickly after biting you, so you don’t see them around.

I don’t have friends with outdoor pets, so I don’t think so.

It sounds more like hives to me. Google up some images and see if they resemble what you see, and read about them as well.

Hives looks more patchy and larger, with a skin color area in the center of each red area. I just have this one little thing at a time. That’s another reason why I think bedbugs may not be the answer- all the pics of bedbug bites are multiples, and I only ever have a single.

Atopic dermatitis (eczema)

It’s not eczema, or anything systemic or lasting. Just the one little area, no more than 1/2" across.

Are you familiar with chiggers? If the bites are usually on your lower body (especially around your waistline, groin, back of your knee, etc) that may be a possibility.

I got bed bugs from a jacket I left on a chair. They started biting me when I was on a plane wearing the jacket.

Reported