Guys, it's more tender than painful. And it isn't by any stretch unbearable. On a 0 to 10 scale it would be a 3 when being rubbed hard (i.e., shampooing). When not being touched, it's a 0.2. It's not a sharp pain but kind of a diffuse local soreness.
Maybe I have a really tight scalp? I don't have any wrinkles on my forehead or anything like that, so I think my skin is pretty tight. Maybe the tightness of the scalp is causing the tenderness.