One last mystery from me (unless you want to hear about both times child me was almost abducted, or when i assumed i was hearing a ghost but it was most likely a break-in):
In 2012, during the school year (it was probably fall) i woke up at like, 1am with a crazy burning pain on my right arm, just above the elbow. There were 5 red bumps, and they felt like burns. I immediately scratched at them, then rinsed it under the sink which made the burning stop. I went to bed, since i was home alone and my mother liked to leave her cellphone home so i didn't have anyone to contact.
The next morning, the bumps were now high domed and had gone yellowish. They were each maybe a 1/4" or less across. They were in roughly a straight line, except a slightly smaller mark on one end of it that was down a little. I bandaged them and went to school.
It was about a week before an adult noticed these (they itched like hell and eventually i ran out of bandaids).
The doctor said they were spider bites. Apparently spiders bite over and over? Made no sense.
Eventually the domed parts fell off, the marks being hollow inside, and they scarred. They still itched for like, 2 years.
I still have them now. Each one is a circle (although they have blurred with time) with 5 dots: 4 at each quarter, and 1 in the center. On one, the dots looks more like small circles.
Weirdly, about a month after this my older sister got a mark too.
My mom claims my sister did this to me but she wasn't even home that night.
I've never figured out what caused this but hey, it's a weird mystery.
The whole week leading up to this i had crazy, super detailed nightmares too, although i don't remember a lot about them anymore.
Edited to add a picture. The scars are old but you can still make out 3 of them.