More skin cancers are found on the left side of the face than the right, and this has been linked to sun exposure while driving, according to research at Saint Louis University that appears in the Journal of the American Academy of Dermatology.

While professional drivers were indicated as prime targets for excessive sun while driving, daily commuters and anyone who drives frequently in the summer with the windows open should also take notice.

Previous reports indicate that skin cancer appears on the left arm more than the right for similar reasons.

If you look at your two arms and your left arm is darker than the right or has more freckles or dark spots, you are already experiencing drivers’ sun exposure.

If you tend to spend a lot of time outdoors in the summer, protect your skin by applying a broad spectrum sunscreen that filters both UVA and UVB radiation.

Tinted glass and UV filters on car windows also help block the sun’s rays.

If you notice a mole or skin marking that becomes asymmetric in shape or has uneven borders, color that varies, diameter larger than a pencil eraser or a mole that in changing in shape, size or color, see a dermatologist.

When detected early, most skin cancers can be successfully treated.