Detailed answer

Acne breakouts can leave behind post-inflammatory hyperpigmentation (PIH) or dark spots, which can result in an uneven skin tone. When the skin is inflamed due to acne, the body produces excess melanin in the affected areas, causing hyperpigmentation. This can lead to the appearance of dark spots, redness, or discoloration on the skin. It is important to treat acne properly to prevent further inflammation and minimize the chances of developing uneven skin tone. Additionally, prolonged sun exposure without proper sun protection can worsen hyperpigmentation and uneven skin tone caused by acne.