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Simply put, PIH is skin darkening caused by damage. The stimulation of melanin production is an immune-triggered inflammation that’s designed to defend, protect, and heal.

PIH may result from abrasions and other wounds, but the most common cause is acne. It only takes one spot!

A blemish needs three things to flourish:

  • A collection of dead skin cells, often encouraged by an oily skin type
  • Spot-causing bacteria such as P. acnes
  • A pore that traps and incubates the above two.
  • When these three boxes are ticked, a flood of foreign bacteria congregate, and the body senses this as an invasion. In response, the body triggers healing inflammation.

This explains the cause of the eruption, but why do acne lesions also leave behind hyperpigmentation? At present, we know just half of the answer.

Scientists know that when an inflammatory healing response is initiated, increased melanin production will be triggered. Darker forms of melanin help to protect skin from sun damage. It’s thought that PIH may be provoked to help defend this weakened area of skin, although the biological reason is not fully understood.

Now that you understand the cause of your PIH, you may be wondering just how long it plans to hang around. The answer to this question depends on:

  • The severity of your wound, including its depth
  • Your natural skin tone
  • Your skin’s natural exfoliation rate

How Can I Make Hyperpigmentation Marks Fade Faster?

Whether you’re experiencing hyperpigmentation caused by acne, hormonal changes, or UV exposure, the treatments are the same.

Skincare treatments  & products that fade hyperpigmentation marks fast:

Treatments: Salicylic Acid Peels/Skin Needling


  1. Physical exfoliants
  2. Chemical exfoliants
  3. Brightening actives such as Niacinamide, Vitamin C, Kojic acid, Liquorice extract

And always wear sunscreen!

-Collette xx