I waxed my bikini line and it is now really red and swollen, how do I reduce the swelling?

try to use this brand: monistat (smoothing care) --- itch relief cream (maximum strength), blue tube

make sure ALL the wax is gone, take a cool shower, then put aloe on it as many times as you want. That worked for me :)

use plenty of moisturiser. if you already have, then continue to do so.
did you use a sensitive wax solution made for your bikini line? if not, that's definitely something to look into next time.