I feel it in my ladyparts; it's almost like needing to urinate, but not quite and urinating never alleviates it. I always assumed that's what people talked about when they said "butterflies in my stomach" but my partner says he feels nervousness in his actual stomach, above his bellybutton.

Legs.

Bounce, bounce, bounce, bounce, bounce, bounce, bounce...

Chest - heart/lungsish.

Same as Miko. Chest - heart/lungs.

Heart/lungs, and also just a general restlessness--I'll walk back and forth in my tiny apartment because I can't sit still.

my arms, which is think is a manifestation of the general restlessness that Melismata talks about. I feel shaky and fidgety.

Any stress, including the positive type or trying to make a moderately difficult decision like where to eat lunch, causes me chest pains. That is why I cannot work.

Intestines and chest. And jaw -- I tend to grind my teeth or clench my jaw when I'm nervous or anxious.

Nervousness is usually in the pit of my stomach (my real stomach, not the intestines).

Fear or quick dread (Is there someone walking behind me in the dark? What would happen if I were to cut myself accidentally with the knife that is slipping in my hand right now?) goes up and down the back of my legs, mostly in my calves.

I never get a chill down my spine from fear.

Stomach (nauseated), heart, lungs, bowels (makes me head for the bathroom).

Worry = solar plexus center belly angsty pain, I got this a lot when I was a kid.

Nervous a la "need to make big presentation" : chest and wow I can't sit still I'll just pace lots when getting more coffee shall I?

Someone close to me is worrying about or nervous for me: tingly upper arms. (This is a pain: If I am nervous for a presentation, and then mom joins in with her nerves I get a double-whammy of upper-arms and chest-nerves. I've learned not to tell her anything, but travel plans, so my arms tingle whenever I travel now. )

Needing to wee senstation = emotional nervousness. For example, trying out for college I felt that, because it was a Big Dream™ of mine, but usually I'll feel this one in regards to someone of the opposite sex that I haven't realized I fancy yet. It's when the heart more than the brain is nervous.

Stomach. It feels like it's turning flips.

Stomach.

I feel a type of slow growing seething anger in my genitals sometimes.

depends on the type of nervousness. Anticipation is in the stomach. Performance-type (I'm giving a speech/a recital/on stage) makes my hands go dry & cold.

Shoulders. I can tell I'm nervous when I hunch.

Stress exits through my feet.

Chest/throat.

Crawls up my back in a wide swath and then settles in my upper chest.

Since others have mentioned genitals, I will share that mine do the frightened turtle thing.

Another stomach person here. I feel a tension just beneath my belly button, and if I am really tense/fearful, it radiates upward internally through my chest to the hollow in my neck.

I get it in my knees. They feel all watery (if that even makes sense) and I usually have to go sit down for a while.

Definitely in my jaw, but I rarely get nervous, more like stressed out.

actual physical fear, my legs go weak, literally. Simple nerves, dry mouth. that's about it.