That's a sign of Psoriatic Arthritis

I have it in my nails and it looks like a thimble dents.

My nails have vertical ridges, and are soft.

I recently had a really bad flare up and when I started healing I noticed little dips or pits in my nails. I asked my dermatologist about it and he said: "people say your eyes are the window to your soul, your nails are the window to your health" the pits in my nails will stay for a long time but eventually grow out, its just a reminder of how very sick I was. But I started healing now and my nails have never grown so fast and strong!

psoriasis has effected my nails .afew on my hands and one on my toes .years ago a always used nail polish which made it less noicable .dont use anymore but is hard to keep nice looking nails ,
dry flakey skin is part of it and itchy.i dont think you ever get use to psoriasis .u just live with it