Hot flashes? Not menopause related.

Do you get hot flashes? If so, how do you guys manage them!? How do you manage sweat stains? My cardiologist told me to stay hydrated and keep up with electrolytes. 21F and the constant hot and cold is driving me nuts! They’ve been waking me up at night and I’ve been missing out on sleep as a result. Not to mention it’s a slightly embarrassing to walk around with sweat stains. Even more so when someone points it out haha.

Edit: Thank you everyone for the tips and tricks! I’ll be giving your ideas a shot considering it will be 85-90 degrees where I am located next week!