A mark and a scar are different things

Postinflammatory hyperpigmentation means a dark mark after inflammation; postinflammatory erythema means redness. Most acne scars are atrophic, meaning indented or sunken. That is a texture change, not just a colour change. The word 'scar' is doing two jobs here, a filing problem the face did not ask for. Colour changes can take months or longer to fade, while acne scars are usually permanent, though they can improve over time or with treatment. Colour changes can take months or longer to fade, which is a slow reply from skin.34

What should you do if acne is still active?

If breakouts continue, keep using your acne treatment: new breakouts can cause new acne scars. If you want treatment for a lasting texture change, have a dermatologist examine it first. Treatment varies by scar type, so identifying the type helps guide the next step.24

How do you use COSRX Snail Mucin Essence?

For your face, apply two to three pumps after thinner products and before thicker ones, giving one routine step an oddly strict place in line. For your face, neck, and upper chest, use four to five pumps.5

Can you use COSRX Snail Mucin Essence every day?

Yes. COSRX says to apply it once or twice a day as desired.5

Does COSRX Snail Mucin Essence help with redness?

COSRX lists the essence under redness and sensitivity and describes it as soothing, nourishing, and hydrating. That supports using it as a moisture step for soothing; it is not the same as expecting a red mark to fade. Redness after acne can be postinflammatory erythema, and colour changes can take months or longer to improve.13

Where this answer comes from

  1. 1Redness & Sensitivityb2c.cosrx.com
  2. 2Scars and stretch marksaad.org
  3. 3Acne Scarringdermnetnz.org
  4. 4Acne scars: How to care for your skin after treatmentaad.org
  5. 5All About the Snail: COSRX Advanced Snail Skincare FAQscosrx.com