You may think I'm crazy but I know a very good cure against big surnburst : Yoghurt
Spread it on the bursts and massage until it penetrates under your skin, wait for about 20 minutes until it's dry then have a shower and go to bed.
Tomorrow you'le be fibe.
I know it's kinda weird but you can believe me it works, I have it from during a trip in Turkye by a turk guy who said it to me one day i had terrible suburst.
I've personaly tested it a few years ago...
Off course, avoid flavoured yoghurts or fruit yoghurts. The most basic the yoghurt is, the better it works.