What do Braxton hicks feel like? And where do you feel them at?

your stomach will tighten, I feel them sometimes and sometimes I don't but you'll know

I just learned that I've been having them for awhile and didn't know. I thought I'd be in pain or be uncomfortable when they happen and I feel neither, just a tightening in my upper abdomen. I just thought it was the baby balling up but my dr confirmed it was a BH

You can also have them in your back and sides.