You finally got your psoriasis patch under control, but now there’s a dark mark where it used to be. If you’re dealing with dark marks after psoriasis, you’re not imagining things, and you’re not alone. The good news is that these marks are usually harmless and often fade. Here’s why they appear and what can help.
Why Do Dark Marks Show Up?
The marks are called post-inflammatory hyperpigmentation, or PIH. When your skin is inflamed, as it is during a psoriasis flare, it can make extra pigment (melanin). Even after the flare heals, that extra pigment can stay behind as a brown, tan, or gray-brown spot.
A few things to know:
- It’s more common and lasts longer in darker skin tones. Deeper skin tones tend to produce more pigment after irritation.
- It’s not a scar. The skin’s texture is usually normal.
- It’s not the psoriasis coming back. It’s what’s left after the inflammation is gone.
- Sun makes it darker. UV exposure can deepen the marks and slow fading.
Some people see the opposite: lighter spots where psoriasis was. That’s also a leftover effect of inflammation, and it usually improves with time too.
How Long Do They Last?
There’s no one answer. Many marks fade over several weeks to months. In deeper skin tones, or with strong or repeated flares, they can take longer. Research shows treatments are often slow, and results vary from person to person. Patience matters.
What Actually Helps
1. Treat the psoriasis itself
The most important step is calming the inflammation. Every new flare can leave a new mark. Keeping psoriasis under control is the best way to keep dark spots from piling up. For more on what drives flares, see our guide to what actually causes psoriasis.
2. Use sunscreen every day
This is the single most useful habit for dark marks. Sun exposure makes pigmentation darker and slower to fade. Use a broad-spectrum sunscreen on exposed areas, and choose a gentle formula that doesn’t irritate your skin.
3. Be gentle with your skin
Rubbing, scratching, picking, and scrubbing all cause more inflammation, and more inflammation means more pigment. Psoriasis can also flare in injured skin, so rough treatment risks a new patch.
- Skip harsh scrubs and exfoliating brushes
- Don’t pick at scale
- Pat dry instead of rubbing
- Moisturize daily
4. Ask about prescription options
Dermatologists often use ingredients such as azelaic acid, retinoids, or prescription lightening agents to help fade lingering marks. These can work, but they can also irritate skin that has psoriasis. It’s best to have your dermatologist pick the right one and tell you how to use it.
What to Be Careful About
| Be Careful With | Why |
|---|---|
| Strong peels, lasers, or microdermabrasion | Can cause more irritation and darker marks, especially in deeper skin tones |
| Harsh DIY remedies (lemon juice, bleach, strong acids) | Can burn skin and make marks worse |
| Applying treatments to active psoriasis patches | Can irritate and trigger new inflammation |
| Over-the-counter “lightening” products with unclear ingredients | May irritate skin or contain ingredients you shouldn’t use without guidance |
| Skipping sunscreen | Undoes much of the progress |
Is It Really Just a Mark?
Most of the time, yes. But see a doctor if:
- The mark is new and you’re not sure what it is
- It’s changing shape, size, or color
- It’s raised, bleeding, or won’t heal
- You’re not sure whether it’s leftover pigment or active psoriasis
- Marks aren’t fading after several months of consistent care
Dark marks can be frustrating, especially when you’ve worked hard to get your skin calm. Most of the time they fade, and the best things you can do are keep your psoriasis controlled, protect your skin from the sun, and be gentle.
Mike Marenick is the founder of HealFast Skincare and holds the patent for his invention, Ovasome Technology, used in skincare formulations. He began developing skincare products after watching his mother manage psoriasis for decades, and has spent over twenty years formulating treatments for chronic skin conditions. His work has been featured on Home Shopping Network, in two national infomercials, and in more than 300 publications including Vogue, Newsweek, and Allure. He is not a medical doctor — always consult a dermatologist for diagnosis and treatment of skin conditions.
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