Chemical peels are effective in treating various forms of hyperpigmentation, including melasma, sunspots, and post-inflammatory hyperpigmentation. However, their efficacy can vary depending on the depth and type of peel, the severity of the hyperpigmentation, and individual skin characteristics. While they can significantly reduce many hyperpigmentation forms, it's essential to manage expectations and understand that some deep or stubborn spots may require multiple treatments or a combination of procedures.