Sun Exposure: UV rays trigger excess melanin production, leading to dark spots.
Post-Inflammatory Hyperpigmentation (PIH): Acne or injuries can cause pigmented marks as they heal.
Hormonal Changes: Conditions like melasma occur due to hormonal shifts, often during pregnancy.
Medications: Certain drugs, like chemotherapy agents, can lead to pigmentation changes.
Aging: Over time, “age spots” or liver spots can appear due to cumulative sun exposure.