“When you’re wearing a wig, if it’s tight, snug or just right for your size head, take brakes from wearing your wig. Even if you think its not so tight on you, trust me: the longer you wear it without brakes the worst. By not doing so, you slow the blood circulation in your head and it can lead to being light-headed. Which is very bad. Just like you would to take brakes from wearing a big costume, its also the same for wigs as well. Trust me.” Quote from toris-fan-nest
This is more of a cosplay tip, but I like posting cosplaying tips too. It’s always good to let your head breath for a little while. Take off your wig cap as well, because a lot of that discomfort comes from your wig cap. You don’t have to walk around in cosplay with no wig though. You can just go up to your room to put stuff away, and take your wig off for a few minutes before going back.
Solid advice, even with a fitted wig. Especially in hot, cramped conditions.