Reducing redness of razor burn before Prom?

Talk about bad timing, that sucks. I'm afraid it'll be near impossible for to be gone completely in six hours, it should be a lot less red though. I'm guessing you'll still have a few red dots, but as you won't be lifting your arms constantly it really won't be that noticable. I'd say foundation, but as it's your armpits the sweat won't go well with that. Do you have a cover stick by any chance, it's less likely to melt and if you just have dots of red, you can use the stick to cover up the redness. In any case, don't freak out too much about it, there are worse things than having a few red dots under your armpits, you could've had a giant break-out on your face. Try the make-up, and keep using the cold cloth until you start getting ready, hopefully it'll diminish more of the redness. And remember you won't look hideous or anything because of some razor burn, it won't be that noticable.