humans sweat in all sorts of areas, forehead, legs, feet, everywhere on the body. but why do humans sweat the most under the armpits? is it because armpits are very much closed in together from the chest to the arm?

I was dancing and worked up a sweat. The perspiration from my forehead got in my eyes, and it felt like acid was burning me. Why are my eyes so sensitive to my own perspiration?
Is there a doctor in the house?

I was fine all day at work and at home very late I had that feeling in my stomach I was going to have loose bowel, which I did. I then had sweat dripping from my forehead and face, and I almost felt like vomitting but didn’t.