Ice/frost inside house, corner of the room
 

Not sure what section to put this in. But today I noticed some ice/frost inside our room. It's on my girlfriend's side, and I never noticed it before because she usually has a pillow/blanket down there, as it usually is cold down there.

It's been unusually cold here over the last 7-10 days, averaging about -13f during the day and -30f over night. This corner of the room is one of the four outer corners of the house.

What does this mean? Why is this happening? IS there anything I can do? Should do? Is it really bad to be happening?
attached picture of it.

Ayuh,... My guess is, there's a lack of insulation in that area,...

Air leaks, no insulation, not air sealing in the basement or crawl space.

i was told, that slab houses, in my area, do that.

If they do there were built wrong in the first place.

ya think . but, was it wrong back 50 years ago ? they didn't think so, and/or didn't care.

Hello
Thanks for the replies.
Well it seems it cleared up once I removed the blankets/pillows that were blocking it. Tiny bit of mold there that we had to clean up.

Should the issue be fine now? Or is it something that still needs to be fixed?

who knows. your just going to have to keep an eye on it. if mold doesn't grow back, it should be ok.