>> cool the burn with cool or lukewarm running water for 20 minutes – don't use ice, iced water, or any creams or greasy substances such as butter

http://www.nhs.uk/Conditions/Burns-and-scalds/Pages/Introduc...

> You should go to a hospital A&E department for:

> all chemical and electrical burns

> large or deep burns – any burn bigger than your hand

> burns that cause white or charred skin – any size

> burns on the face, hands, arms, feet, legs or genitals that cause blisters

You can definitely use creams like sunscreens or similar. True, I did overstate a bit - you don't want to use something like butter that will turn to oil and keep in the heat.

You should not apply creams, lotions, or sunscreens.

https://www.healthdirect.gov.au/burn-and-scald-treatments

> don’t use any ointments or creams on a burn. They seal heat in and cause more damage.