Suggest Treatment For Miliaria Rubra

Hi, I suffer from Miliaria rubra and have just returned from a trip to Turkey where it ruined my holiday. I am going to Itlay for a friends wedding on Tuesday and do not want the same to happen as the wedding is outdoors as are the celecrations.
When i am in Indai working I do not suffer from this for some reason only really when I am in Europe.
I have read that Anhydrous lanolin coul dhelp but wher do i buy this from and should it be in a cream or just the ingrediant itself?
Is there anything else you can advise to try to prevent the prickly heat. I have everything so help sooth it once i get it but can i take / do anything to prevent it happening?
Many thanks
Toni