While any inflammatory skin condition can result in hyperpigmentation, the most common causes of PIH in patients with darker skin color are acne vulgaris, atopic dermatitis, and impetigo.
What causes post inflammatory hyperpigmentation?
Postinflammatory hyperpigmentation can occur with various disease processes that affect the skin.
These processes include
- allergic reactions,
- infections,
- trauma,
- phototoxic eruptions.
Fractional laser photothermolysis occasionally induces postinflammatory hyperpigmentation.
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