A brief primer on scoop marks  They are not caused by bugs!
Channel: Artifactsofmars
Date: 2016-03-24

The most common explanation for scoop marks is bedbugs. Artifactsofmars dispels that and other myths associated with this strange phenomenon. No, psychiatrists cannot help the situation, and neither can praying to Jesus.  This is a physical phenomenon with no proven cause but I can certainly state that insects and arachnids like ticks do not cause it.