Sun exposure, hormones, lights of various types or injuries can trigger excess melanin production , causing uneven skin tone.
This occurs when some areas of skin become darker in color compared to the surrounding skin. It can be caused by various factors such as sun exposure( UVA/UVB), hormonal changes, inflammation, various lighting of different wavelegths or skin injuries/inflammation .
Both UVA and UVB are ultraviolet rays that can harm your skin. UVB rays don’t penetrate as deeply as UVA rays. Still, they can cause sunburn and are more likely to cause skin cancer. UVA rays also contribute to the formation of skin cancer, but since they penetrate the deeper layers of your skin, they also contribute to signs of premature aging and wrinkling. UVA rays comprise 95% of the UV rays that reach the earth’s surface.
Always choose a “broad-spectrum” sunscreen, which protects from UVB and UVA rays. Not all sunscreens meet the FDA’s broad-spectrum guidelines, so make sure to check for those words on the label.
