All About Allergic Reactions to Eyelash Extensions

Lash Allergies & Irritations: What Every Lash Artist (and Client) Should Know

As lash artists, we care deeply about our clients - not just how they look, but also how they feel. While allergic reactions to lash extensions are rare, they can happen. And when they do, it’s our responsibility to respond with care, professionalism, and proper guidance.

Let’s break down the difference between irritation and allergy, what causes them, and most importantly - what to do (and not do) if your client experiences symptoms.

First and Foremost: Your Eyes Deserve Professional Medical Attention

If a client is experiencing swelling, itching, redness, or irritation - they must visit an eye doctor (ophthalmologist). Not a general practitioner, and definitely not Google.

Every person reacts differently. We do not suggest any treatments or medications because we cannot know what someone may be allergic to. Even home remedies can make things worse for sensitive eyes.

And lash artists: do not remove lash extensions unless you have written permission from the eye doctor. Most lash removers are strong chemical products and using them on already irritated eyes can make the situation worse.

What is Lash Extension Irritation?

Irritation is usually caused by glue fumes, poor application technique, or pre-existing skin sensitivity. Symptoms include:

• Slight redness
• Mild itching or burning
• Tearing
• Swelling around the lash line

These symptoms often appear within the first few hours and usually settle within 24 - 48 hours - especially when proper technique and quality products are used.

What is an Allergic Reaction?

Allergic reactions are more intense and persistent. They can include:

• Significant swelling of the eyelids or eye area
• Itchy, watery eyes
• Redness that doesn’t go away
• Hives or reactions elsewhere on the body
• Breathing difficulty (in rare cases)

An allergy doesn’t fade like irritation. Symptoms usually get worse over time and require immediate medical attention.

Common Ingredients That Can Cause Reactions

1. Latex – Often builds up over time with repeated exposure. Use latex-free glue if a client has a known latex sensitivity.
2. Carbon Black – The pigment in black glue. If a client is allergic, opt for clear adhesive instead.
3. Cyanoacrylate – The main bonding agent in lash glue. Unfortunately, if a client is allergic to this, they cannot have lash extensions at all.

How to Respond When a Client Has a Reaction

If a client contacts you after an appointment with symptoms, ask these questions:

• Is there swelling or puffiness? Where?
• Are both eyes affected or just one?
• Is it itchy, painful, or uncomfortable?
• Is the eye itself red or irritated?

If their symptoms are moderate to severe - do not try to fix it yourself. Tell them gently but clearly: “Please see an eye doctor immediately. Your eye health is the priority.”

If the symptoms are mild and appear to be irritation, keep in touch with the client and check in after 24 hours. If it doesn’t improve - or worsens - refer them to a specialist.

Never Remove Lash Extensions Without Medical Guidance

Even if a client is uncomfortable, we do not remove lashes unless an eye doctor gives us clear permission. Here’s why:

• Most removers contain strong chemicals that can irritate an already sensitive area.
• Swollen or damaged eyes need to be evaluated by a medical professional before any procedure.
• If removal is approved, always use cream remover (not gel or liquid), and avoid contact with the skin or eyes.

Once removed, cleanse the lashes gently and refer your client back to their doctor for follow-up care.

How to Treat Mild Irritation (Only When It’s Safe to Do So)

If you’re sure it’s not an allergy, and symptoms are light, you can:

• Use a nano mister to help cure the adhesive faster and reduce fumes.
• Gently fan the area to disperse any remaining vapors.
• Recommend a cold compress to reduce puffiness (only if lashes stay dry).
• Never suggest anti-inflammatories or medication. That’s for the doctor to decide.

How to Minimise the Risk of Reactions

• Always work in a well-ventilated space
• Use fresh, in-date products
• Keep your tools and area clean
• Offer patch tests for new clients
• Stock hypoallergenic adhesives (latex-free, carbon black-free)
• Use anti-allergy gel nearby to absorb fumes
• Use a nano mister and fan to speed up curing
• Educate your clients about aftercare and hygiene
• Always get a signed waiver form explaining the risks

Final Thoughts

Allergic reactions are rare, but they do happen.As lash professionals, our job is to act responsibly, never diagnose or treat, and always prioritise our client’s health.

If anything unusual happens: refer to a medical professional immediately.

Want to learn more about handling lash consultations, building client trust, and offering a safe lash experience? Check out our blog or explore our eyelash extension courses.