Irritation and Infection Risks: “The major risk of eyelash extensions is irritation of the eyes. Eyelash extensions typically require a [glue] to attach the extension to the natural follicle, and eyes are incredibly sensitive to these chemicals,” says Dr. Nazarian. “Even many hypoallergenic ingredients can still inflame or irritate tissue by weighing them down or pulling on the hairs... hence the inherent problem with extensions.” She continues, “Anything around the eyes can irritate, either due to the chemicals or due to the friction and tugging forces around the lashes.” To prevent irritation and allergic reaction, it’s a good idea to do a patch test on your hand with the adhesive. Dr. Nazarian also recommends that you request your esthetician use a latex- and formaldehyde-free adhesive, since these ingredients are two of the most common irritants.2
Investment of Time and Money: Your initial set will cost anywhere from $100-300, with refills setting you back around $50-150 every 2-4 weeks. Getting your initial set can take up to two hours, with refill appointments lasting up to an hour.
Potential Damage to Natural Lashes: Even if you see the best lash artist and execute your aftercare perfectly, it’s still very possible that you’ll see damage to your natural human hair eyelashes. As your natural lashes grow, your extensions get farther and farther from the root of the lash. This makes it harder for your natural lashes to support the weight of the extension, which can cause breakage. Rubbing or itching your lashes in your sleep (either with your hands or against your pillow) can also cause damage to natural lashes. 3
Uneven Fallout: Your lashes are at all different stages of growth at any given time, which means that some lashes are in a period of growth, while others are getting ready to shed. This means that a few weeks after your appointment, some extensions will fall out as lashes shed and are replaced with new, extension-free eyelashes, while others will remain in tact. This can create an uneven, scattered effect if you don’t get your extensions refilled every 2-4 weeks.