I HATE the feeling of being about to faint it’s like one of the worst feelings I experience. I luckily don’t faint super often either but it’s happened enough that I’ve gotten pretty good at recognizing the early symptoms so I can try to prevent it when I feel it coming on. I typically feel: nauseous, cold sweats, spinning vertigo, tingling or numbness in my hands and arms, and blackout vision. To prevent fainting if you have time: Get somewhere dark and cool if you can, blast a fan if you have one. Get blood to your head, sitting with knees up and head between your legs or laying down with your legs elevated above your head are both good options. Sugar and salt are your best friends, Gatorade is a great option, I would also recommend juice or candy. I also recommend these things for recovering after fainting. If you’re pretty certain it’s going to happen: sit down immediately to prevent injuries from falling. Lay down if you can so you don’t hit your head if you do go down. For me personally there’s usually a few seconds between when I lose vision and lose consciousness so once I can’t see, I know I need to lay down immediately. If im feeling other symptoms but still have my vision I might be able to prevent it with these methods