Overexpose ultraviolet (UV) radiation from the sun or tanning salons is the common cause of skin cancer. It causes 80% of skin cancer cases. UV rays can damage DNA, the genetic material that makes up genes. Genes control the overall health of skin cells.
If the genetic damage is severe, a normal skin cell may begin to grow in the uncontrolled, disorderly way of cancer cells.
There are two types of ultraviolet (UV) rays,
- Ultraviolet A (UVA) wavelengths 320 to 400 (nm) in length.
- Ultraviolet B (UVB) wavelengths are 280 to 320 nm in length.
Researchers once thought that excessive exposure to UVB rays was the main cause of skin cancer. Now they think that UVA also takes apart. That’s why it is important to use a sun block product that protects against both UVA and UVB rays.
In most cases, UV rays react with a substance called melanin that is found in the skin. This is the first defense against the sun, as it is the melanin that absorbs the dangerous this cause of skin cancer rays that can do serious skin damage. The sunburn develops when the amount of UV damage exceeds the protection that the skin’s melanin can provide.
While a small amount of exposure to sunlight is healthy, while overexpose can be dangerous and may cause of skin cancer. Measures should be taken to prevent overexposure to sunlight in order to maintain the risks of cancers, premature aging of the skin, and other bad effects.