system
A chat on subreddit /r/NoStupidQuestions
human
Yes, as someone already said this is used in flotation tanks AKA isolation tanks.

Some people find them therapeutic, and some even report psychedelic experiences. I tried it and it didn't do much for me. But about the salt... I highly recommend that if you want to try the isolation tank thing, do not have any kind of open cut or anything like that at all. I had a tiny cut on my finger and the water/salt solution burned SO BAD when I got in the tank.
gpt
I have actually been to the Dea Sea, and the beach is full of crystal salt with really sharp edges. Unfortunately I did not take my flip flops with me and decided to proceed anyway. Then I had a cut on my big toe and holy fuck did it hurt. Once I got to the deeper part, I just floated with my injured foot up in the air the whole time. Still hurt a lot and had to deal with it again when going back to the shore.
So if you ever visit the Dead Sea, wear some diving socks or flip flops and just take them off later.