Detailed answer

Hyperpigmentation is the darkening of certain areas of the skin caused by excess melanin production. While facial oils and oil-based skincare products can provide hydration and nourishment, they can also trap dirt, dead skin cells, and pollutants on the skin's surface. Over time, the accumulation of these impurities can clog the pores and lead to inflammation, which can stimulate melanocytes to produce more melanin. This excess melanin can then result in hyperpigmentation. Additionally, some individuals may be more prone to developing hyperpigmentation due to their skin type or existing skin conditions. Therefore, it is important to ensure proper cleansing and exfoliation to prevent the build-up of impurities when using facial oils or oil-based skincare products.