Near-daily “safe sun” exposure-that is, 10 to 20 minutes o: unprotected exposure during peak hours of the day-is beneficial to health, but too much sun exposure to ultraviolet radiation is a major contributor to skin cancer. The most common sites of skin cancer are the areas exposed to the sun most often (face, neck, and back of the hands). Ultraviolet rays are strongest when the sun is high in the sky. Therefore, you should avoid prolonged sun exposure between 10:00 a.m. and 4:00 pm. Take the shadow test: If your shadow is shorter than you, the ultraviolet (UV) rays are at their strongest.
There are three main types of skin cancer, each named after the type of cell from which they originate:
Basal cell carcinoma. Basal cells form the base, or the innermost layer of the epidermis.
Squamous cell carcinoma. Squamous originates from the word “scale.” These flatter cells from the outside layer of the epidermis and shed as new cells form. Melanoma originates in cells that Create melanin, which gives color to skin.
Basal and squamous cell carcinoma require treatment but in the majority of cases do not spread to other parts of the body. Melanoma. The most deadly type of skin cancer, can appear quickly and metastasize in as little as 6 months. In 2016, it caused approximately 10,130 deaths in the United States. That number is expected to double by 2030. About 20 percent of Americans will develop skin cancer in their lifetime. Treatment for no melanoma skin cancer increased by more than 75 percent between 1992 and 2006. Melanoma is the number-one cancer killer of young women and increased 800 and 400 percent in young women and young men, respectively, between 1970 and 2009.
Consequences Of Sun Exposure.
One to two blistering sunburns can double the lifetime risk for melanoma, even more so if the sunburn takes place prior to age 18, when cells divide at a much faster rate than later in life. A person can easily be overexposed during a day in the sun sooner than they expect and not realize until later in the day when the sunburn becomes painful and the damage is already done. Overexposure can be difficult to predict because the strength of the sun exposure varies according to the time of year, a location’s latitude and elevation, and the sun’s reflection off
snow or water, among other factors. Be sure to understand how sun exposure changes by studying the “Sun Exposure” behavior modification planning. Furthermore, nothing is healthy about a “healthy tan” Tanning of the skin is the body’s natural reaction to permanent and irreversible damage from too much exposure to the sun. Even small doses of sunlight add up to a greater risk for skin cancer and premature aging. The tan fades at the end of the summer season, but the underlying skin damage does not disappear.
The stinging sunburn comes from ultraviolet B (UVB) rays, which are also thought to be the main cause of premature wrinkling and skin aging, roughened/leathery/sagging skin, and skin cancer. Unfortunately, the damage may not become evident until up to 20 years later. By comparison, skin that has not been overexposed to the sun remains smooth and unblemished and, over time, shows less evidence of aging.
Sun lamps and tanning parlors provide mainly ultraviolet A (UVA) rays. Once thought to be safe, they too are now known to be damaging and have been linked to melanoma. As little as 15 to 30 minutes of exposure to UVA rays can be as dangerous as a day spent in the sun. Similar to regular exposure to sun, short-term sun exposure to recreational tanning at a salon causes DNA alterations that can lead to skin cancer.