Anyone know what causes excessive sweating? What about some ways to cure it?

Hyperhidrosis is the constant sweating of hands.

I seem to be having hot flashes the past couple of days. I feel like I’m radiating heat. At night when I go to sleep mostly. My feet feel really hot and my bed sheets & pillow get really hot. Yesterday i was pretty relaxed and while at work, the air was fine, but I started feeling really hot and started sweating. Are there any physical things that can cause this, other than menopause? This is different from just being hot…I feel like I’m "in heat".

My wife has a sweating problem. How do you get sweat stains out of whites?
Are there any good products that stop underarm sweat or at least minimize it? My wife sweats alot under the arms and it stains her white shirts. Any help would be great! thank you.

ok, so for a while I could use deodorant and not sweat but lately its been horrible and embarassing. This is underarm sweating I have tried degree old spice and gillete all 3 clinical protection and it doesnt work i dont know what to buy anymore