Uneven skin tone tends to develop slowly, with factors contributing to discolouration over time. The most common causes include:
Sun Exposure
Ultraviolet (UV) radiation can damage multiple layers of your skin. To protect itself, the skin produces extra melanin. This overproduction of melanin can result in dark spots.
Breakouts
The stress from a breakout can trigger excess melanin production or damage blood vessels, leading to post-blemish marks. These red, brown or purple marks stay behind on the skin after a blemish has healed. There are two types of post-blemish marks.
Post-Inflammatory Erythema (PIE): Blemish-related inflammation can damage the tiny blood vessels in your skin. PIE results when those damaged blood vessels remain visible, even after a blemish is gone. PIE is more common in lighter skin tones.
Post-Inflammatory Hyperpigmentation (PIH): Sometimes the skin reacts to stress (like blemishes) by making too much melanin. PIH results when extra melanin concentrates in one place and creates a dark brown or purplish spot. PIH is more common in melanated skin.
Environmental Stressors
Pollution, harsh weather, and UV exposure can damage the skin and trigger excess melanin production. This may contribute to dark spots, dullness, and uneven skin tone.
Aging
The skin’s renewal processes naturally slow with age, making our skin more susceptible to sun damage and discolouration.