Hands age, just like the rest of your
skin.
Sun exposure can leave skin looking
leathery and
weathered. What happens when you just use a daily
SPF on your face? Your
neck and
hands show the
wrinkles,
sunspots, and
age. It looks pretty silly.
The skin on your hands is more likely to be damaged, than say the skin on your forearms. This is due to
exfoliation from just washing your hands more often than the rest of your body, and simple tasks where dead skin is
sloughed off through rubbing and touch. The washing of hands a few times a day, is also why they put SPF in handcream. You don't wash your face a few times a day at work, and hopefully you applied some sort of
SPF to your face at home.
The sun damages your skin during the winter, as well as in the summer. I live in
Florida, where you wind up with a slight tan from just driving, walking in and out of buildings etc.. It is importent to protect your skin from
UV rays, not only for aestetic reasons, but for your health.
Skin cancer is not fun. Like they say,
wear sunscreen.