"All tanning can lead to skin cancer, whether you use a tanning bed or lay in the sun," says Roberta Sengelmann, MD, dermatologic surgeon at the Siteman Cancer Center at Barnes-Jewish Hospital and Washington University School of Medicine.

To prevent against the damaging effects of the sun, Dr. Sengelmann says to apply sunscreen daily all year round. "Sunscreens have improved dramatically over the past 10 years," she says. "Look for one with zinc oxide and use a minimum SPF of 15. This is important especially if you are fair skinned."

The cumulative dose of ultraviolet light over your lifetime is the main risk factor for skin cancer. By age 18, a person has received most of their lifelong sun exposure. "That''s why we really have to take care of our children by setting an example of wearing sunscreen daily, and making sure they wear sunscreen too," Dr. Sengelmann says.

There is no need to stay inside and be afraid of the sun, however, you do need to "use common sense" to protect yourself from skin cancer and the aging effects of the sun. Dr. Sengelmann says:

• Avoid long periods of sun exposure (more than 20 minutes) between 10 a.m. and 4 p.m.

• Use SPF 15 sunscreen every day, even if you don''t think you''ll be in the sun.

• For prolonged sun exposure, increase to an SPF 30-50 sunblock with zinc oxide.

• Pay close attention to all exposed skin, and apply sunscreen 30 minutes before going into the sun.

• Be sure to reapply at least every two hours and after water or vigorous activity.

• Wear a wide brimmed hat and sunglasses to shade your face – the last place one wants to get skin cancer or wrinkles.

• Do not "lay out" or use tanning beds.

Dr. Sengelmann recommends seeing a board-certified dermatologist at least once a year for a general skin examination. "Skin cancer can be cured if it''s detected early," Dr. Sengelmann says. "But it can be disfiguring or even deadly if it goes untreated. Dermatologists see skin cancer every day and are best adept to recognize it and begin appropriate treatment early."

For more information about the Siteman Cancer Center Skin Savers Team or a referral to a Barnes-Jewish Hospital physician, call 314-TOP-DOCS or toll free 1-866-867-3627.