Ever wonder if all those hours logged driving down the Parkway with the sun on your face is leaving any kind of lasting mark?

Take a look at Bill McElligott's face and you'll see that it is.

McElligott worked as a truck driver for nearly 30 years, driving an hour to and from work, working 6 a.m. to 3 p.m. with the sun hitting the left side of his face.

In an interview with ABC News, he said it was 15 years before he noticed a difference between the two sides of his face.

He said his grandchildren started asking questions about the bumps on the left side of his face, and so he tried to get them removed.

Doctors diagnosed him with unilateral dermatoheliosis, also known as photo-aging.

It is caused by long-term exposure to UVA rays.

He said he also often noticed that his left arm was more tan than his right, because he would drive with the window open.

I'd always heard that people in the U.S. are more prone to get skin cancer on their left sides while people in the U.K. tend to get it on their right sides because of our driving habits. I never thought it was really that big of a deal until I saw this picture.

You don't realize how much sun you get while you're in the car! Guess it's time to stock up on sunscreen.

Will this change your sunscreen wearing habits? Add your comments below!