The sunlight that reaches the earth has ultraviolet A and
ultraviolet B (UVA and UVB) rays. These ultraviolet rays are the main causes of
damage to the skin from the sun. UVA and UVB rays affect the skin's sensitivity
to sun exposure in different ways.
Can pass through window glass.
not affected by a change in altitude or weather.
Is present all day
and every day of the year.
Penetrates deep into skin
Is 20 times more abundant than UVB rays.
long-term skin damage.
Cannot pass through window
Helps the body make vitamin D.
During the middle of the
In the summer.
At high altitudes and near the
Can cause skin cancer and cataracts.
Protect your skin
Protect your skin from too much sun when outdoors.
Seek shade from 10 a.m. to 4 p.m.
Cover up with a wide-brimmed hat and tightly-woven clothing.
Wear UV-blocking sunglasses.
Apply broad-spectrum sunscreen on any exposed skin, even when it's cloudy. Use SPF 30 or higher. Reapply as needed.
ByHealthwise Staff Primary Medical ReviewerWilliam H. Blahd, Jr., MD, FACEP - Emergency Medicine Adam Husney, MD - Family Medicine Specialist Medical ReviewerE. Gregory Thompson, MD - Internal Medicine
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