Azelaic Acid in Skincare: Benefits, Uses, Side Effects & How to Use

Acne breakouts, persistent redness, uneven skin tone, and dark spots are some of the most common skin concerns. Finding a skincare ingredient that addresses more than one of these concerns can make building a skincare routine easier. One ingredient worth knowing about is azelaic acid.

Azelaic acid is a multitasking skincare ingredient known for its anti-inflammatory, antimicrobial, and pigmentation-reducing properties. It is commonly used to manage mild to moderate acne and can also help improve the appearance of post-acne marks and certain forms of hyperpigmentation. Dermatologists also use it to treat papulopustular rosacea, a condition associated with facial redness and inflamed bumps.

Unlike some stronger exfoliating ingredients, azelaic acid is generally well tolerated by many skin types. However, its effects depend on the formulation, concentration, skin concern, and consistency of use.

So, what exactly does azelaic acid do, how should you use it, and what precautions should you know about? Let's explore its benefits and practical uses for healthier-looking skin.

What Is Azelaic Acid?

Azelaic acid is a naturally occurring dicarboxylic acid with anti-inflammatory, antimicrobial, and keratinization-regulating properties. It can be found in small amounts in grains such as wheat, barley, and rye. It is also produced naturally by certain yeasts that live on the skin.

The azelaic acid used in commercial skincare products is manufactured for formulation and quality control. It is available in different concentrations and product types, including creams, gels, and other topical formulations.

Azelaic acid works through several mechanisms. It helps reduce inflammation, limits the growth of certain bacteria associated with acne, and regulates abnormal keratinization that can contribute to clogged pores. It also inhibits tyrosinase, an enzyme involved in melanin production, which explains its usefulness for certain types of pigmentation.

Depending on the formulation and the country in which it is sold, azelaic acid may be available in over-the-counter skincare products or as a prescription treatment.

What Are the Benefits of Azelaic Acid for Skin?

Azelaic acid is valued because it can address several skin concerns without relying on a single mechanism. Here are its main benefits.

1. Helps Manage Acne

One of the best-established uses of azelaic acid is the treatment of mild to moderate acne.

Acne develops through several processes, including clogged hair follicles, inflammation, excess sebum, and the activity of Cutibacterium acnes, a bacterium associated with acne.

Azelaic acid helps by:

• Reducing inflammation associated with acne lesions.
• Limiting the growth of certain acne-associated bacteria.
• Helping normalize the shedding of skin cells inside hair follicles.
• Reducing the formation of clogged pores and comedones, including blackheads and whiteheads.

These effects can make azelaic acid useful for both inflammatory acne, such as papules and pustules, and some non-inflammatory acne lesions.

However, results vary from person to person. Persistent, painful, nodular, or scarring acne may require additional treatment from a dermatologist.

2. Helps Fade Post-Acne Dark Spots

Acne can leave dark marks even after pimples have healed. These marks are often caused by post-inflammatory hyperpigmentation (PIH), in which inflammation stimulates excess pigment production.

Azelaic acid inhibits tyrosinase, an enzyme involved in melanin synthesis. It is used in anti acne skincare products to reduce excess pigment production, it can gradually improve the appearance of post-acne dark spots and uneven skin tone.

This can be particularly helpful for people whose acne lesions leave persistent brown or dark marks.

Remember that pigmentation fades gradually. Regular use, appropriate moisturization, and daily sun protection can support more consistent results.

3. Helps Improve Uneven Skin Tone

Uneven skin tone can result from acne, sun exposure, inflammation, and other pigmentation-related conditions.

Azelaic acid may help improve the appearance of uneven skin tone by reducing excessive melanin production in affected areas. With continued use, some people notice that dark patches and discoloration become less noticeable.

It is important to distinguish between treating pigmentation and changing your natural skin color. Azelaic acid is intended to help manage specific skin concerns, not to bleach healthy skin or alter your natural complexion.

4. Helps in Treating Melasma

Melasma is a common pigmentation condition characterized by brown or gray-brown patches, usually appearing on the cheeks, forehead, upper lip, and other sun-exposed areas. Hormonal changes, genetic factors, and ultraviolet and visible light exposure can contribute to melasma. Because this condition can be persistent and recurrent, treatment often requires a long-term approach.

Azelaic acid is an established topical treatment option for melasma. It helps reduce excess pigmentation by inhibiting tyrosinase, an enzyme involved in melanin production. It also has anti-inflammatory properties that may contribute to its benefits for uneven skin tone.  Dermatological studies have examined formulations containing 20% azelaic acid for this purpose.

A systematic review and meta-analysis of six randomized controlled trials involving 673 patients found that azelaic acid improved melasma severity compared with hydroquinone. However, further research is needed to confirm its long-term effectiveness.

For better results, combine treatment with a broad spectrum SPF 50 sunscreen with PA++++ rating and consult a dermatologist for personalized advice.

Reference: Azelaic Acid Versus Hydroquinone for Managing Melasma.

5. Helps Reduce Inflammatory Redness Associated With Rosacea

Azelaic acid has anti-inflammatory properties that make it useful for certain forms of rosacea, particularly papulopustular rosacea.

This condition can cause persistent facial redness along with inflamed bumps that resemble acne. Azelaic acid may help reduce these inflammatory lesions and improve some associated redness over time.

However, not all facial redness is caused by rosacea. Redness can also occur because of irritation, allergic reactions, eczema, or other skin conditions.

Azelaic acid may itself cause temporary stinging or burning, particularly when the skin is already irritated. If redness persists or worsens, seek medical advice rather than assuming you need to continue using the product.

6. Helps Improve Skin Texture

Azelaic acid has keratinization-regulating properties, meaning it helps address abnormal skin-cell buildup within hair follicles.

This action may help reduce clogged pores and improve the appearance of uneven texture associated with comedonal acne. As breakouts and post-acne marks improve, the skin may also appear smoother and more even.

However, azelaic acid is not a guaranteed treatment for enlarged pores, deep acne scars, or every type of rough skin texture.

7. May Suit Some People With Sensitive or Acne-Prone Skin

People with acne-prone skin sometimes find that strong exfoliating products or multiple active ingredients cause dryness, redness, or irritation.

Azelaic acid is often considered an option for people who want to address acne and pigmentation together. It is generally well tolerated, although sensitive skin can still react to it. You may also want to pair it with an anti-acne cleanser suited for acne-prone skin.

It is not accurate to say that azelaic acid always strengthens the skin barrier or never causes irritation. If you have eczema, an impaired skin barrier, or an active skin flare, consult a healthcare professional before introducing it.

How Does Azelaic Acid Work on the Skin?

Azelaic acid addresses different skin concerns through several mechanisms.

How Azelaic Acid Helps With Acne

Step 1: Helps regulate skin-cell buildup.
Azelaic acid helps normalize keratinization within hair follicles, reducing the processes that contribute to clogged pores.

Step 2: Limits certain acne-associated bacteria.
It has antimicrobial activity against bacteria associated with acne, including Cutibacterium acnes.

Step 3: Reduces inflammation.
Its anti-inflammatory effects can help improve the appearance of inflamed acne lesions.

Step 4: Helps address post-acne pigmentation.
By inhibiting tyrosinase, azelaic acid can reduce excessive melanin production and gradually improve the appearance of dark marks left behind by acne.

How Azelaic Acid Helps With Pigmentation

Azelaic acid helps manage pigmentation primarily through its effects on melanin production.

Step 1: Inhibits tyrosinase.
Tyrosinase is an enzyme involved in the production of melanin, the pigment responsible for skin color.

Step 2: Helps reduce excess pigmentation.
By inhibiting this enzyme, azelaic acid can help reduce excessive pigment production in affected areas.

Step 3: Gradually improves the appearance of dark spots.
With consistent use, certain forms of hyperpigmentation, including post-acne marks, may become less noticeable.

Results are gradual, and the outcome depends on the cause of pigmentation, treatment consistency, and sun exposure.

How to Use Azelaic Acid in Your Skincare Routine

Using azelaic acid correctly can help you get the most out of your skincare product while reducing the risk of irritation.

1. Choose the Right Product

Azelaic acid is available in different formulations and concentrations. The appropriate option depends on your skin concern, sensitivity, and whether you are using a cosmetic or prescription product.

Lower-concentration products may be suitable for some beginners, while stronger formulations may be recommended for specific skin conditions under medical guidance.

A higher concentration is not automatically better for everyone. Follow the product label or your dermatologist's instructions.

2. Start With a Simple Routine

If you are new to azelaic acid, introduce it gradually rather than adding several active ingredients at once.

A basic routine can look like this:

Morning

1. Use a gentle face cleanser.

2. Apply azelaic acid if your product instructions allow morning use.

3. Apply a moisturizer.

4. Finish with broad-spectrum sunscreen of SPF 30 or higher.

Evening

1. Cleanse your skin gently.

2. Apply azelaic acid if appropriate for your product and schedule.

3. Apply moisturizer.

Follow the instructions for your particular formulation. Some products are designed for once-daily use, while certain prescription preparations may be directed for twice-daily application.

3. Introduce It Gradually

For a new skincare product, begin with the frequency recommended on its label or by your healthcare professional. If you have sensitive skin, you may need to introduce it more cautiously.

A patch test can help identify some reactions, although it cannot guarantee that irritation will not occur when the product is used on your face.

Avoid applying azelaic acid to broken, severely irritated, or inflamed skin unless a healthcare professional specifically advises you to do so.

4. Use Sunscreen Consistently

Although azelaic acid is not generally considered a photosensitizing ingredient, sunscreen is important when treating dark spots, acne marks, and melasma.

Use a broad-spectrum sunscreen with SPF 30 or higher every morning, and reapply as directed, particularly during prolonged outdoor exposure.

Sun protection helps prevent existing pigmentation from becoming darker and supports your overall skincare routine.

5. Be Careful When Combining Active Ingredients

Azelaic acid can sometimes be used alongside other skincare ingredients, but combining multiple actives may increase irritation.

Be particularly cautious when introducing retinoids, exfoliating acids such as glycolic acid, or benzoyl peroxide. You do not necessarily need to avoid these ingredients altogether, but you may benefit from introducing them separately or using them at different times.

If you are using prescription acne treatments or have persistent skin sensitivity, consult a dermatologist before combining products.

How Long Does Azelaic Acid Take to Work?

Azelaic acid does not produce overnight results. The time needed to see improvement depends on the skin condition being treated, the formulation, and how consistently it is used.

• Acne: Some improvement may become noticeable after approximately four weeks, although more substantial improvement can take several months.

• Post-acne dark spots: Pigmentation may take several weeks to months to fade.

• Rosacea: Improvement may take several weeks, and some people need around 12 weeks or longer to assess the full benefit.

• Melasma: Treatment may require several months and ongoing sun protection.

These are general timeframes, not guarantees. If your condition is worsening or you see no meaningful improvement after the recommended treatment period, consult a dermatologist.

What Are the Side Effects of Azelaic Acid?

Azelaic acid is generally well tolerated, but side effects can occur, especially when treatment begins or the skin is sensitive.

Possible side effects include:

• Mild stinging or burning.
• Itching or tingling.
• Redness or irritation.
• Dryness, scaling, or peeling.

These effects may be temporary, but persistent or severe symptoms should not be ignored.

Stop using the product and seek medical advice if you develop significant burning, swelling, severe redness, blistering, or a worsening rash. Seek urgent medical care if you experience signs of a serious allergic reaction, such as difficulty breathing or swelling of the lips or tongue.

Who Should Be Careful When Using Azelaic Acid?

Azelaic acid is suitable for many people, but certain situations require extra care.

• People with very sensitive skin: Introduce the product cautiously because irritation is possible.
• People with eczema or an active skin flare: Seek professional advice before applying it to inflamed skin.
• People with a known allergy: Avoid azelaic acid or other ingredients in the formulation if you have a confirmed allergy to them.
• People using multiple active ingredients: Review your routine to reduce the risk of excessive irritation.
• People who are pregnant or breastfeeding: Topical azelaic acid may be an option, but discuss its suitability with your healthcare professional before use.

You do not necessarily need to avoid azelaic acid simply because you have sensitive skin. The decision should depend on your skin's condition, the product, and your individual tolerance.

Azelaic Acid vs. Retinol: Which Is Better?

Azelaic acid and retinol are different skincare ingredients with different strengths. Neither is universally better than the other.

Azelaic acid is particularly useful for acne, inflammatory redness associated with certain skin conditions, and post-inflammatory hyperpigmentation.

Retinol is a retinoid that supports skin-cell turnover and is commonly used for acne, uneven texture, and signs of skin aging. It can cause dryness, peeling, and irritation, especially when first introduced.

If your main concerns are acne-related dark spots and inflammatory redness, azelaic acid may be a useful option. If your goals include acne treatment and improving the appearance of fine lines, a retinoid may be considered depending on your skin and medical history.

Both ingredients can cause irritation, and the right choice depends on your needs. Retinoids should generally be avoided during pregnancy, whereas topical azelaic acid may be an alternative after professional advice.

Conclusion

Azelaic acid is a versatile skincare ingredient that can help manage mild to moderate acne, post-acne dark spots, uneven skin tone, and certain forms of inflammatory redness. Its antimicrobial, anti-inflammatory, and pigmentation-regulating properties make it a useful option for people dealing with more than one skin concern.

However, results depend on the formulation, frequency of use, skin condition, and individual response. Although azelaic acid is generally well tolerated, irritation can still occur, so introducing it appropriately and following product instructions are important.

For the best results, combine a suitable skincare routine with daily sun protection and seek professional advice when treating persistent acne, rosacea, or melasma.

Medical disclaimer: This article is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment. Consult a qualified healthcare professional if you have a persistent skin condition, are unsure which treatment to use, or experience a significant reaction to a skincare product.

References

1. DermNet. Azelaic acid: Uses, application and more.

2. Sauer N, et al. The multiple uses of azelaic acid in dermatology: mechanism of action, preparations, and potential therapeutic applications. Postępy Dermatologii i Alergologii. 2023;40(6):716–724.

3. Banner Health. Azelaic acid and its benefits