Pie acne actually refers to post-inflammatory erythema (PIE), which are the flat, red, pink, or purple marks left on the skin after an acne breakout has healed. It is not active acne itself.
Here's a more detailed breakdown:
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What it is: PIE is characterized by discoloration that occurs because of damaged capillaries (small blood vessels) underneath the skin. The inflammation from acne lesions triggers this damage.
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Appearance: It presents as flat spots on the skin that are typically red, pink, or purple. The color depends on your skin tone and how severe the inflammation was.
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Cause: Inflammation caused by acne leads to the dilation and damage of capillaries. Even after the acne is gone, these damaged vessels remain visible, causing the discoloration.
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Difference from Post-Inflammatory Hyperpigmentation (PIH): PIH is another type of post-acne mark, but it's brown or dark brown in color and is caused by excess melanin production (pigment) in the skin. PIE is related to blood vessel damage, not melanin.
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Treatment: PIE typically fades on its own over time, but this can take months or even years. Treatments that can speed up the process include:
- Topical treatments: Ingredients like niacinamide, vitamin C, and azelaic acid can help reduce redness and promote healing.
- Laser treatments: Vascular lasers can target and reduce the appearance of damaged blood vessels.
- Chemical peels: These can help exfoliate the skin and promote cell turnover.
- Sun protection: Using sunscreen daily is crucial to prevent further damage and discoloration.
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Prevention: The best way to prevent PIE is to treat acne effectively and quickly to minimize inflammation. Avoid picking or squeezing pimples, as this can worsen inflammation and increase the risk of PIE.
In short, "pie acne" is just another term for the red or pink marks left behind after acne heals, technically called post-inflammatory erythema (PIE).
