much sun, it produces extra pigment (melanin) to protect itself — which can form dark spots.
2. Natural Aging
As the skin ages, it becomes more sensitive to sunlight. This makes dark spots more frequent, especially after the age of 40.
3. Hormonal Changes
4. Skin Inflammation
Any irritation or injury — such as a scratch, pimple, or rash — can leave behind a darker mark once it heals.