I don't do exactly that, but I always catch myself scratching at the back of my hands while I have panic attacks. I have absolutely no idea I'm doing it until I look down to discover it.

I have plucked my eyebrows without realizing it. Yikes. But I had trauma with the anxiety. Now I am catching myself doing it when I am just anxious

They sound like ways to relieve the excess anxiety-you are distracting your brain/body when pinching, scratching, etc. If you think about it, you can move another way to change the habit (like stretching or tapping, or moving your feet or shaking your hands). I rub my collarbone and the back of my neck when I am feeling anxious. I flush too (get red from my chest up to my neck). I can't hide it unless I am wearing a scarf!

I do this weird breathing thing where I flutter my lips and breathe out. I didn't realize I was doing it until one day my husband asked me what I was doing and if I was okay.

Yup. With me, I tap my teeth with my finger nails. It's my way of showing I am under stress I guess.

I do multiple things. (not all at the same time lol)

I pick at my scalp. I can't keep my fingers out of my hair. So, I then find little bumps to pick at.

I take a string and twist it up into a little ball- then I rub it with my fingers. (it's calming for me)

I also have a condition that I forget the name of in which I pull my hair out.

Yep! I totally do something very similar to that. When I have anxiety, I essentially "run my fingers" through my "hair" (more like my scalp -- I shave my head!). As I type this, I'm kind of laughing because it sounds so absurd. But good to know we're all not alone, right?

I tend to scratch around my collar bone instead on pinch.