Causes of Dark Spots on the Face and How to Prevent Them Dark spots, also known as hyperpigmentation, occur when certain areas of the skin produce excess melanin. These patches can make your complexion appear uneven, but with the right knowledge and care, they can be prevented and reduced. 1. Sun Exposure Excessive sun exposure is one of the leading causes of dark spots. UV rays stimulate melanin production, resulting in tanning or localized pigmentation, especially on the cheeks and forehead. 2. Post-Acne Marks After acne heals, it may leave behind dark spots known as post-inflammatory hyperpigmentation (PIH) . This occurs when the skin’s healing process triggers excess pigment formation. 3. Hormonal Changes Hormonal fluctuations during pregnancy or from contraceptive use can lead to melasma , a type of pigmentation that typically appears symmetrically on the face. 4. Harsh or Unsuitable Skincare Over-exfoliating or using products with strong ingredients can irritate the skin ...