People can develop skin cancer from spending time in the sun without protection. The sun emits ultraviolet light that can cause mutations in the DNA of skin cells. Those who live near the equator have an increased risk of developing cancer from sun exposure. It is imperative that people understand what causes skin cancer so that they can take adequate steps to protect themselves from this risk. People also need to learn about the symptoms so that they can seek treatment from a board-certified dermatologis like Dr. Tony Nakhla.
What are Some Common Skin Cancer Symptoms?
The most common symptom is a persistent spot on the skin that bleeds and produces a superficial erosion. Individuals should examine their skin regularly and have all unusual growths examined by a licensed dermatologist. If an existing spot on the skin starts changing in size, color or shape, have it examined by a professional.
UVA, UVB & UVC Sun Rays and Exposure Can Cause Skin Cancer
Exposure to ultraviolet light is the main cause of skin cancer. There are three types of ultraviolet light: UVB, UVA and UVC.
UVC rays are the most dangerous. Fortunately, the ozone layer prevents these rays from reaching the earth’s surface. With that said, people can still develop skin cancer from exposure to UVA and UVB radiation.
UVA light can penetrate the skin’s surface level and damage the connective tissue. Even when people are standing in shady areas, they still receive 50% of UVA exposure. Those who have light skin are more vulnerable to UVA rays than those who have dark skin. Approximately 55% of UVA light can pass through light skin. Dark skin only allows 17.5% of UVA light to pass through.
Most sunburns are the result of UVB radiation. Thanks to the ozone layer, only five percent of UVB light reaches the earth’s surface. UVB light does not penetrate as far into the skin as UVA light, but it can still cause skin cancer. DNA absorbs UVB rays directly. Those who have light skin are more likely to suffer the effects of UVB radiation than those who have dark skin.
How Does Skin Cancer Develop?
When UV light penetrates the skin, it damages the body’s cellular DNA. This damage occurs from the hyperactive molecules that UV light contains. Those who spend time in the sun without wearing protection should undergo a skin cancer detection test.