I don't have a lot of psoriasis: mild patches in the folds of and behind my ears, and small patches on the back of my scalp. I've been using clobetasol for years so even my hairdresser can't see anything.
I've never experienced psoriasis anywhere else. I do have mild nail symptoms but no pitting. No one except a good dermatologist or rheumatologist can tell that I have psoriasis at all.
When I was diagnosed a year ago with PsA the first rheumatologist I saw classified my PsA as "mild" based on the fact that I had such minimal nail issues and no plaques. Never mind the fact that I have bone marrow edema in my spine, long term tendonopathy that originates at the joints, one SI joint is fused due to sacroilitis, etc.
My mom, who has severe plaque psoriasis, and I joke that she has psoriatic disease on the outside and mine is on the inside.
So while I technically have psoriasis, it's hardly enough to even meet a clinical diagnosis and is difficult to see.