“My acne is finally getting better, but why do I still have dark spots?”
Or maybe you’ve tried benzoyl peroxide, salicylic acid and retinol, but your skin keeps getting irritated.
Then you scroll through social media and see another ingredient everyone seems to be recommending:
Azelaic acid.
People are talking about it for acne, redness, dark spots and even rosacea.
So is azelaic acid really that versatile? Or is it just another skincare trend?
Unlike many trending ingredients, azelaic acid has actually been studied in dermatology for decades. Let’s look at what it does, what the clinical evidence says and whether it might be suitable for your skin.
What Is Azelaic Acid?
Azelaic acid is a naturally occurring dicarboxylic acid, a type of organic acid also found in grains such as wheat, barley and rye.
Despite having “acid” in its name, it doesn’t work exactly like glycolic acid or salicylic acid.
Azelaic acid is particularly interesting because it targets several processes involved in acne and pigmentation.
It has antimicrobial, anti-inflammatory, comedolytic and pigment-regulating properties.
In simpler terms, it can help address more than one skin concern.
How Does Azelaic Acid Actually Work?
1. It Helps Prevent Clogged Pores
Acne often begins when dead skin cells accumulate inside a hair follicle and mix with sebum.
Azelaic acid helps normalize the way skin cells develop and shed within the follicle, reducing the formation of clogged pores.
This is one reason it can help with both blackheads, whiteheads and inflammatory acne.
2. It Targets Acne-Associated Bacteria
Azelaic acid has antimicrobial activity against Cutibacterium acnes (C. acnes), a bacterium involved in acne development.
Unlike topical antibiotics such as clindamycin, azelaic acid is not classified as an antibiotic.
It provides another way to address acne-associated bacteria without relying on prolonged antibiotic treatment.
3. It Reduces Inflammation
Those red, swollen pimples aren’t simply clogged pores. Inflammation plays an important role in making acne lesions painful and noticeable.
Azelaic acid can help reduce inflammatory activity in the skin.
This is also why it is used in dermatology for certain forms of rosacea.
4. It Helps Fade Dark Spots
This may be azelaic acid’s most appealing feature for people dealing with acne.
When a pimple heals, inflammation can leave behind excess pigmentation. This is called post-inflammatory hyperpigmentation (PIH).
Azelaic acid helps inhibit tyrosinase, an enzyme involved in melanin production.
By influencing this pathway, azelaic acid may help improve the appearance of post-acne dark marks while also treating active acne.
Think of it as an ingredient that can help with both the breakout and some of the marks left behind.
Does Azelaic Acid Really Work? What Does the Research Say?
Let’s look at a clinical study rather than relying only on social media reviews.
A 2024 randomized, double-blind, placebo-controlled study evaluated 15% azelaic acid gel in 72 patients with mild-to-moderate acne.
Participants used the treatment twice daily for 12 weeks.
Researchers assessed acne, post-acne redness and post-inflammatory hyperpigmentation.
The study found improvements in post-acne redness and pigmentation measures, with generally mild adverse reactions. Some outcomes improved significantly compared with placebo, although not every pigmentation comparison showed the same degree of benefit.
These findings support azelaic acid as a useful option for people concerned about both acne and the marks it leaves behind.
Azelaic acid is also included in the American Academy of Dermatology’s 2024 acne treatment guidelines, although its recommendation is conditional rather than among the strongest recommendations.
Azelaic Acid 10% vs 15% vs 20%: Is Stronger Always Better?
You may have noticed that azelaic acid comes in different concentrations.
| Concentration | What you should know |
|---|---|
| 10% | Common in cosmetic skincare products; direct clinical evidence for acne is less extensive than for 15–20% formulations |
| 15% | Well-studied in prescription dermatology formulations, including gels |
| 20% | Traditionally studied in creams for acne and pigmentation concerns |
Here’s something important:
A 20% cream isn’t automatically twice as effective as a 10% serum.
Azelaic acid has relatively poor water solubility, which creates challenges when formulating it into topical products.
The formulation base, particle characteristics and delivery system can influence how effectively the ingredient reaches the skin.
That means two products containing the same concentration of azelaic acid may not behave identically.
In Canada, Finacea 15% gel is a prescription medication, listed by Health Canada for rosacea. Its regulatory indication should not be confused with the broader clinical research investigating azelaic acid for acne.
In the US, the FDA has approved 15% gel for rosacea and 20% cream for acne.
Can Azelaic Acid Cause Irritation?
Yes.
Although azelaic acid can be suitable for some people with sensitive or acne-prone skin, that doesn’t mean it’s completely irritation-free.
Possible side effects include:
- Stinging or tingling
- Burning sensations
- Dryness or itching
- Redness and peeling
These reactions can be more noticeable when treatment is first introduced.
In a 2023 randomized study comparing 20% azelaic acid cream with 5% tranexamic acid solution for post-acne hyperpigmentation, both treatments improved pigmentation, but irritation-related adverse effects were more frequent with azelaic acid during the first month.
The takeaway: Start cautiously, especially if you’re already using exfoliating acids, benzoyl peroxide or prescription retinoids.
If you experience severe burning, swelling or persistent irritation, stop using the product and seek advice from your pharmacist or healthcare provider.
How Should You Introduce Azelaic Acid Into Your Routine?
A simple routine is often the best starting point.
Morning: Gentle cleanser → moisturizer → broad-spectrum sunscreen SPF 30 or higher.
Evening: Gentle cleanser → azelaic acid → moisturizer.
Depending on your skin tolerance and the specific product instructions, your healthcare provider may recommend starting with less frequent applications before increasing.
Avoid introducing several new active ingredients at once. Otherwise, if irritation develops, it becomes difficult to identify which product is responsible.
And remember, sunscreen is especially important when treating post-acne pigmentation. Without consistent sun protection, dark marks may persist or worsen.
Can You Combine Azelaic Acid With Tretinoin or Benzoyl Peroxide?
Potentially, yes.
Azelaic acid doesn’t have a universal incompatibility with either ingredient.
However, using multiple active treatments can increase the risk of dryness and irritation.
For example, someone using prescription tretinoin may benefit from having their routine assessed before adding azelaic acid.
The goal should be to combine ingredients that target different acne mechanisms without overwhelming the skin.
Sometimes using treatments at different times of day, reducing application frequency or adjusting the formulation can improve tolerability.
Is Azelaic Acid Right for Everyone?
Not necessarily.
Azelaic acid may be particularly useful for people with mild-to-moderate acne, inflammatory breakouts and post-acne pigmentation.
However, someone with deep, painful nodules, significant scarring or severe acne may need additional prescription treatment rather than relying on azelaic acid alone.
And although azelaic acid has multiple benefits, it is not necessarily the best option for every acne mechanism.
The most appropriate treatment depends on your skin condition, severity, previous treatment response and tolerance.
The Practical Takeaway
Azelaic acid isn’t simply another trending skincare ingredient.
It has a long history of dermatological use and clinical research supporting several important actions:
It helps prevent clogged pores, reduces acne-associated bacterial activity, calms inflammation and influences excess pigmentation.
But concentration alone doesn’t tell the whole story. The formulation, other active ingredients and your skin’s tolerance all matter.
If you’re struggling with both active acne and lingering dark spots, speak with your healthcare provider or the compounding pharmacists at Atria about whether azelaic acid or another personalized dermatology formulation may be appropriate.
The goal isn’t to use the most popular ingredient. It’s to choose the right ingredient for what your skin actually needs.
References
- Reynolds RV, Yeung H, Cheng CE, et al. Guidelines of care for the management of acne vulgaris. J Am Acad Dermatol. 2024;90(5):1006.e1–1006.e30. https://pubmed.ncbi.nlm.nih.gov/38300170/
- Shucheng H, Zhou X, Du D, Li J, Yu C, Jiang X. Effects of 15% Azelaic Acid Gel in the Management of Post-Inflammatory Erythema and Post-Inflammatory Hyperpigmentation in Acne Vulgaris. Dermatol Ther (Heidelb). 2024;14(5):1293–1314 https://pubmed.ncbi.nlm.nih.gov/38734843/
- Sobhan M, Talebi-Ghane E, Poostiyan E. A comparative study of 20% azelaic acid cream versus 5% tranexamic acid solution for the treatment of postinflammatory hyperpigmentation in patients with acne vulgaris. J Res Med Sci. 2023;28:18. https://pubmed.ncbi.nlm.nih.gov/37213446/
- Feng X, Shang J, Gu Z, Gong J, Chen Y, Liu Y. Azelaic Acid: Mechanisms of Action and Clinical Applications. Clin Cosmet Investig Dermatol. 2024;17:2359–2371. https://pmc.ncbi.nlm.nih.gov/articles/PMC11512533/
- Petrovici AG, Spennato M, Bîtcan I, Péter F, Cotarcă L, Todea A, et al. A Comprehensive Review of Azelaic Acid Pharmacological Properties, Clinical Applications, and Innovative Topical Formulations. Pharmaceuticals (Basel). 2025;18(9):1273. https://pmc.ncbi.nlm.nih.gov/articles/PMC12472904/