That must be ittyFrom your map, it is possible that the house being shown with your cursor in the screenshot is too close to Crimson. It looks like there is Red Ice Blocks to the left of your housing area, and that may be causing it.
I'd try purifying or removing the Red Ice Blocks nearby and see if that helps it. If that doesn't work, feel free to let me know, and will try to see what else could be causing it.