Do you really need to use sunscreen with UVA protection? A glance at this dramatic picture tells you all you need to know.
The man in the picture drove a delivery truck for 28 years. UVA rays from the sun penetrated the driver-side window. The result: Two faces.
On the side of his face exposed to the sun, the man’s skin has the bumpy, deeply ridged appearance doctors call hyperkeratosis. There are large open pimples, nodules, and the white bumps called milia in his hair follicles.
What happened? To put it simply, the left side of the man’s face has been aged by the sun. It’s a phenomenon called photoaging, resulting in a condition called dermatoheliosis. The right side of his face is largely unaffected.
The man doesn’t have skin cancer, but will have to be watched closely as he’s at high risk. UVA radiation is directly toxic. It also causes DNA mutations. The toxicity and the DNA damage lead to skin cancer.