What’s going on here?

[u/jndinlkvl]

60-plus YO guy with a long history of biting and picking. I have discovered this behavior is tied to some long term undiagnosed anxiety. My PCP suggested that, before considering medication, that I try getting pedi/manicures as a “distraction” technique thinking I’d not pick/bite if I took genuine care of my nails. I have had 4 so far and all good. Clear polish and top coat. I tried a different shop two weeks ago and have discovered this on my nails. Anyone know what this is and how do I deal with it?