I sweat enormously on face! It's so embarrassing. What can I do to stop it?

I've started to sweat a lot on my face. I can't wear make up because it literally swelters off. It's so embarrassing that I'm covered with sweat drops. I don't need to do anything, it's enough that I just sit... Any idea what can cause this? And more importantly, is there any way to stop it?
I sweat enormously on face! It's so embarrassing. What can I do to stop it?
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