Common Sunscreen Questions Answered

Most sunscreen questions come up in a fixed order: when to start, how often to reapply, and who should skip it altogether. This article follows that order and ends on the habit to settle first.

The earliest question: who needs it and who does not

A new sunscreen user usually starts with the basics. The CDC says sunscreen is not recommended for babies who are six months old or younger. For everyone else, the Skin Cancer Foundation keeps a full page on sunscreen that is a sensible place to begin.

The question that follows: how long it lasts

Once a reader is wearing sunscreen, the next question is how long it stays effective. The Skin Cancer Foundation says sunscreen must also be reapplied immediately after swimming or sweating. For a St. Johns reader who spends time at the beach or a pool, that is the guidance to keep in mind.

The question behind both: what the sun is doing to skin

Behind the practical questions sits a larger one about what sunlight does over time. MedlinePlus covers this on its page about aging skin and sunlight, a natural next read once the daily routine is in place.

The habit to settle first

If a reader settles only one habit, it should be reapplying after swimming or sweating, because the Skin Cancer Foundation singles it out. When a reader has questions that a page cannot answer, such as how a particular patch of skin has changed, an in-person assessment is the better route.