What is this bug bite from?

Looks like a spider bite. Have no clue as to which kind however. Where do you live? What kind of spiders reside in your area?

Ouch. If it continues to get worse you might want to see a doctor. Have you tried Benadryl?

What kind of biting insects are out right now in your area? I would avoid sleeping on the floor though if you want to avoid creepy crawly things.

@woodcutter I’m not sure; spiders are definitely here, though. It feels like a spider bite sounds I guess. I slept on the floor to avoid whatever was on my bed. I tried sleeping in it for about five minutes, but couldn’t because I felt like things were crawling on me in paranoia, of course.

If your bite begins to spread rapidly in redness, presents with intense pain, pus or red streaks, seek medical attention immediately.

I can’t access your picture, and the conditions may be different, but your question made me think of this one from @Adirondackwannabe. Seeing a doctor was clearly the right thing to do.

Can’t see the photo.

If this was some type of spider, they’re more likely to be on the floor than on your bed. By the way you’re describing it, it’s probably not bed bugs, so I’d be more concerned about the floor than the bed.

Did you change the sheets?

It’s hard for anyone to guess what it was unless we know where you live (i.e., what insects or spiders are indigenous to your area). If you have not changed the sheets, it may still be in there, either dead or alive. Carefully remove your blankets and sheets, and look for it. Have someone with you if you’re too scared to do it alone… but remember, even if it bit you while you were sleeping, it’s very unlikely that it could bite you again while you’re awake and looking for it (and you’re a lot bigger than it is. You can take it in a fight. :)). If you find it, great – you know what it is. If not, great – you can start sleeping in your bed again, with your mind at ease. Wash your sheets right away. Unless you’re in a place where this sort of thing happens frequently, you’ll probably never have to worry about it again.

@BBawlight See your doctor. It sounds like a spider bite, but don’t screw around with it. I can personally attest to the value of going. As Jeruba posted, I almost got put away by a bug.

I’m sorry. I couldn’t see the link.

Can’t see the picture. If there are two holes at the site of the bite, it is a spider. It could be a staff infection that entered the wound at the time of the bite. I’ve seen that happen before.

I can’t see the picture either.

I get spider bites here, but the spiders are very small and benign and the bite disappears within several days. Localized itching is the only sympton. My cat eats the spiders, which I find reassuring.

(staph infection)

Thanks, Gail. A lot of people don’t know it’s short for Staphylococcus. I think in some cases they suppose you get it from the (hospital?) staff.

Completely off-topic: After a second surgery to clean out the margins of a lumpectomy done three weeks earlier, I developed a huge abscess in the incision. Back to the hospital I went for several days to treat it with heavy-duty IV antibiotics.

I then had to have a visiting nurse come to my home daily for 8 weeks to clean out the wound and pack it with sterile saline-soaked gauze, while it slowly shrank and closed over.

I am convinced that I picked up the staph bug while in the hospital for the second surgery. No one was willing to admit that. My oncologist said, cheerfully, “I haven’ seen anything like that for thirty years.”

Sorry you can’t see the link, guys. It worked last night, but only for a short time because the website I used doesn’t let you link directly to the images, apparently.
Thanks for all the answers, I know that it is most definitely a spider bite. So I shook out my sheets and looked. I should be safe now…