Google the term "thin-skinned," and you'll see an array of references to wrinkles, skin care, spa treatments, etc. That sort of stuff. (Well, I correct myself: you'll see more of that if you search "thinness of skin.")
Thin: now, there's a word larded with layers of meanings.
Face it (a face with wrinkles called "laugh lines," or "laughorist lineage," in my case): today I had a bad case of what I'll term epidural tensionitis.
The tensile strength of my outer psychic layers (id est, skin) was sensitive to the slightest touch. In this case, one

Ever have those days?