After second degree burns, how long to wait for sun tan?

Burns: I presume you had blistering. Although as soon has the skin has recovered by peeling and revealing the newer layer which is pink you should be more carley. This skin will burn more easily. Wear a swim shirt and reapply sunscreen. Also wear a heat.

Sunscreen: The process of healing takes a full year. One must wear sun block, not sunscreen for a year. One can get reactive traumatic hyper pigmentation if you are not careful.