1 doctor weighed in:
Do aks grow without sun?
1 doctor weighed in

Dr. Michael Fisher
Dermatology
In brief: AKs
Chronic sun exposure is the cause of almost all actinic keratoses.
Sun damage to the skin is cumulative, so even a brief period in the sun adds to the lifetime total. Cloudy days aren’t safe either, because 70-80 percent of solar ultraviolet (uv) rays can pass through clouds. These harmful rays can also bounce off sand, snow and other reflective surfaces, giving you extra exposure.

In brief: AKs
Chronic sun exposure is the cause of almost all actinic keratoses.
Sun damage to the skin is cumulative, so even a brief period in the sun adds to the lifetime total. Cloudy days aren’t safe either, because 70-80 percent of solar ultraviolet (uv) rays can pass through clouds. These harmful rays can also bounce off sand, snow and other reflective surfaces, giving you extra exposure.
Dr. Michael Fisher
Dr. Michael Fisher
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