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The question
Why do my dark marks take so long to fade, and how long should I expect?
What's happening in your skin
A dark mark is melanin left behind after inflammation: a pimple, a cut, a burn, a bite. On deeper skin the pigment cells respond to injury more strongly and hand more melanin to the surrounding cells, so the mark is darker and sits deeper. Skin replaces its outer layer roughly monthly, but pigment lodged deeper is cleared by a slower cleanup, which is why marks outlast the injury by months. Think of a stain that soaked through the fabric: the surface washes out, the fibers take longer.
What the research shows
Post-inflammatory hyperpigmentation is more frequent and more severe in darker skin, and treating the underlying inflammation first speeds resolution.
In 68 Black patients, a retinoid produced detectable lightening by week 4; untreated marks did not begin fading until week 24.
Bulengo-Ransby et al., NEJM 1993 (L023)High
Tranexamic acid and niacinamide combinations show benefit at 8 to 12 weeks of daily use.
Lee et al., Skin Res Technol 2014 (L026)Moderate
Lesions can persist months to years; expectation-setting is part of treatment.
PIH algorithms review (L022)Moderate
Our answer
Stop the source of new marks first, protect what you're fading with sunscreen every day, then treat. Expect a first change around week 8 to 12 and real fading over 4 to 6 months. Photograph monthly in the same light and stop checking daily.
ActionTake one photo today, and set a reminder for 30 days.
Which product does this touch?AlphaTone Complex
Educational only, and not medical advice. Dr. Kita Skincare products are cosmetics. If a skin concern is persistent or painful, see a doctor.