Detailed answer

Some hair care products, especially those containing harsh chemicals like hair dyes, relaxers, and bleaching agents, can cause skin hyperpigmentation. These chemicals can irritate and damage the skin, leading to the overproduction of melanin and subsequent hyperpigmentation. Additionally, certain hair care products may contain fragrance ingredients or preservatives that can cause allergic reactions or inflammation, triggering hyperpigmentation in sensitive individuals. It is important to read product labels and avoid using hair care products that contain known irritants or allergens if you are prone to hyperpigmentation. Consulting with a dermatologist or skincare professional can also help in identifying the potential culprits and finding suitable alternatives.