Hi I also had this same problem and cured it by
1.Stopped drinking lager & switched to Guinness or cider with ice (kills the bubbles/co2)
2.Eat oranges or citrus fruit (lemon juice in water,s squeeze on fish etc), even though they are acidic they are alkaline forming when ingested !
3.Use fractionated coconut oil as moisturiser (it's had all the long chain fatty acids removed & is only medium chain fatty acids+ it's cheap on Naissance web site (brilliant stuff)
4.Try to have a more alkaline diet.
5.Follow this guide and you should be normal again within days I promise you.
I now have the best skin ever
Regards Jules