Sun Protection

Most people enjoy spending at least some of their time outdoors. Sun exposure is an inevitable part of outdoor activity. Unfortunately, skin damage and skin cancer are risks associated with the sun. Over time, sun exposure causes skin to lose resilience. This leads to the development of blotches, “freckles” (solar lentigines), wrinkles, spider vessels, blackheads, coarse texture and yellow discoloration. Sun exposure also increases your risk of several types of skin cancer. In addition, the outer layer (or lens) of the eye also thickens in response to sun exposure and this can increase the chance of developing cataracts.

Sunlight consists of two types of harmful UV rays – UVB and UVA. UVB rays are the primary cause of sunburn and skin cancer. These rays are blocked by window glass. UVA rays, on the other hand, penetrate through glass and into the dermis, or base layer of the skin. Both types of rays can be problematic for the skin. Fortunately, there a number of things you can to reduce the risk of both skin damage and skin cancer.

SUNSCREEN

The Sun Protection Factor (SPF) on a sunscreen measures its ability to block UVB rays and reduce the risk of sunburn. However, SPF does not measure the amount of protection a sunscreen provides against UVA rays. These rays can cause suppression of the immune system which is basically a weakening of the body’s ability to protect itself from cancer and other diseases. Even with UVB protection, UVA rays can still cause unseen damage and skin cancer. This may explain why some skin cancers can appear anywhere on the body – even places that are not directly exposed to the sun. Although sunscreens offer some protection against UVA rays, it is important to follow a sun protection program.

SUN DAMAGE AND SKIN CANCER

Too much sun at any one time can lead to sunburn (a radiation burn). The redness, pain and swelling from sunburn are comparable to any other type of burn. In most cases, the discomfort is temporary. However, the long-term effects of multiple sunburns are cumulative. Even one significant sunburn increases the risk of the skin cancer, melanoma.

Another problem some sunbathers develop is sun poisoning, an allergic reaction to the UV light called polymorphous light eruption. Redness, bumps /blisters, itching, and burning on exposed skin develop two to five hours after exposure. Other symptoms may include; chills, headache, nausea, and body aches. If this happens, the best thing to do is avoid the sun, especially for long periods of time.

SUN PROTECTION PROGRAM

TREATMENT FOR SUNBURN

References

Habif, Thomas. (2010) Clinical Dermatology, 5th edition, Mosby: St. Louis
UpToDate online, 2009
You may also visit the American Academy of Family Physicians at: www.familydoctor.org