Most treatments that renew skin also make it more sensitive to the sun for a while. Protecting it is the simplest way to keep the result.
How long to be careful
After a light peel, about a week. After microneedling, two weeks. After laser for pigment, at least a month, and through the whole course.
Which sunscreen
A broad-spectrum SPF 50 that you like enough to use every day. Mineral sunscreens with zinc oxide are gentlest on freshly treated skin.
How much
More than most people think: about half a teaspoon for the face and neck, again every two hours outdoors.
Why it matters
Sun on treated skin can bring back exactly the pigment we treated, sometimes darker. A hat and a little patience are cheaper than a second course.
