How can i make my sunburn go away fast? vinegar?

Sunburn redness: Prevention is best remedy. Nsaids & topical corticosteroids have anti-inflammatory properties that may make redness (if not too severe) resolve quickly. Avoid recurrent sunburns as uv skin damage is cumulative over the years.

Simple Care: Sunburn is response of the tissues to injury from solar radiation. It is simply inflammation which means increase blood flow to the area to promote healing. Do not use ice as this can injure already injured skin. Cool water soaks can help as can taking anti-inflammation medicines like Motrin or advil (ibuprofen). Avoid any further damage as this can cause scarring . Good skin cream applied daily/gently helps.