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tswd t1_j6eavg9 wrote

Yep, skin sheds over time so the ones that added melanin to protect from future sun exposure are lost, and the new ones that formed when you weren't in the sun as much aren't expecting to need that extra melanin. (Melanin is what makes skin brown and reduces the risk of sunburn)

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DeepCompote t1_j6feust wrote

So I got a sunburn this summer. The lines on the top of my legs were very bright. The line on my left leg is still visible. How long is a skin cell life cycle?

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TraitorMacbeth t1_j6gq0kv wrote

Not a complete answer, however- if some cells are more damaged by the sunburn, they might get replaced faster

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