Microneedling Serum

Can microneedling cause granulomas?

Written and reviewed by Dermatologist Editorial Team October 13, 2026

Granulomas After Microneedling: Causes, Risks & Serum Safety

Microneedling is widely used in professional skincare, but the products applied during treatment deserve careful consideration. While complications are uncommon, published dermatology research has documented cases of granulomas after microneedling, particularly following procedures involving certain topical cosmetic serums.

Understanding these reactions is important when selecting a professional Hyaluronic Acid Microneedling Serum or other treatment formulation.

What Are Granulomas After Microneedling?

Granulomas are localized collections of inflammatory immune cells that develop in response to certain substances, infections or persistent inflammation.

During microneedling, tiny needles temporarily disrupt the skin barrier. Products applied during treatment may therefore interact with the skin differently than they would during ordinary topical application.

In rare cases, (less than .2%) the immune system may react to introduced substances, resulting in persistent bumps, redness or inflammatory plaques.

These reactions can develop days or weeks after treatment and may require evaluation by a dermatologist.

What Does the Research Say?

A 2025 systematic review published in Dermatologic Surgery identified 15 patients across 13 studies who developed granulomatous inflammation following microneedling.

Vitamin C-containing serums featured prominently in reported cases, although researchers could not always identify the exact ingredient responsible.

An earlier report published in JAMA Dermatology described three women who developed facial granulomatous reactions following microneedling. Two had been treated using the same vitamin C serum and subsequent testing supported a possible hypersensitivity reaction.

These cases demonstrate why products intended for everyday skincare should not be considered suitable for microneedling.

Importantly, published case reports establish that these reactions can occur, but they do not establish their frequency among all microneedling treatments.

Can Hyaluronic Acid Cause Granulomas?

Hyaluronic acid, when developed specifically for microneedling, is widely valued in professional skincare for its hydration and lubrication properties.

However, the presence of HA in a serum does not automatically establish that the finished product is suitable for microneedling.

Some reported reactions involved complex formulations containing multiple ingredients.

It is also important to distinguish injectable HA fillers from microneedling HA formulations used during microneedling, as their application methods and associated risks differ.

Currently, there is insufficient evidence to conclude that high molecular weight HA prevents granulomas or that HA itself was responsible for the reported multi ingredient serum reactions.

Why Microneedling Serum Selection Matters

When selecting a professional microneedling serum, practitioners should consider more than hydration or treatment glide.

Important considerations include:

Ingredient simplicity: Avoid unnecessary ingredients that do not serve the intended treatment purpose.
Full ingredient disclosure: Understand the entire formulation, not just its featured active ingredient.
Sterility and microbiological quality: Look for appropriate testing.
Intended use: Choose products evaluated for their specific professional application.
Formulation performance: Consider viscosity, lubrication and compatibility with the intended treatment.

For treatments where glide is the primary objective, high molecular weight hyaluronic acid offers useful viscosity and viscoelastic properties.

Learn more in our related article, High Molecular Weight Hyaluronic Acid for Microneedling: Why Glide Matters.

Does a Sterile Serum Prevent Granulomas?

Sterility is an important component of professional product quality, but it does not eliminate every possible adverse reaction.

Sterility testing addresses viable microbial contamination under specified testing conditions.

Granulomas may result from immune mediated reactions to substances that are not microbial.

Sterility and formulation safety are complementary considerations not interchangeable guarantees.

Final Thoughts

Although granulomas after microneedling appear uncommon, published clinical cases highlight the importance of carefully selecting products used during professional treatments.

A serum suitable for ordinary topical skincare is not appropriate for application during microneedling.

For practitioners, understanding ingredient composition, product testing and intended use is essential to making informed treatment decisions.

Choosing a purposefully formulated microneedling serum is about more than achieving smooth glide. It is about selecting a product with appropriate quality and a formulation suited to its intended professional application.