Can Eyelashes Be Too Long? Trichomegaly and Eyelash Extensions

“I want the longest lashes possible!” – this is a phrase every lash stylist has probably heard at least once. Long, thick lashes are a dream for many clients, but… can lashes be too long?
Yes – and in some cases, this stops being an aesthetic issue and becomes a health concern.

One such condition is trichomegaly, which refers to abnormal eyelash overgrowth.

In this article, you will learn:

➤ what trichomegaly is
➤ why it is a contraindication for eyelash extensions
➤ whether excessively long lashes can be shortened
➤ how to safely perform lash extensions after medical lash trimming

Contraindications for Eyelash Extensions – What You Need to Remember

The most important aspect of any lash styling procedure is safety. Our goal is not only a beautiful result but also the client’s eye health. There are situations in which a lash stylist must refuse to perform the treatment.

The main contraindications include:

• bacterial, viral, and fungal infections (e.g. stye, conjunctivitis, chalazion),

• allergy to cyanoacrylate or other adhesive ingredients,

• active inflammatory skin conditions around the eyes,

• recent eye surgeries or ophthalmic treatments (e.g. glaucoma or cataract surgery),

• trichomegaly.

Trichomegaly – What Is It?

Trichomegaly is a medical term describing abnormal eyelash overgrowth. You may suspect it when the client’s lashes:

• exceed 12 mm in length,

• are unnaturally thick and stiff,

• tangle easily and grow in different directions,

• curl inward toward the eye.

What Causes Eyelash Trichomegaly?

The most common cause is genetics, but trichomegaly may also result from:

• certain medications,

• systemic diseases,

• long-term use of eyelash growth serums.

Particularly problematic are products containing prostaglandin analogues (so-called lash growth stimulators). These substances:

• prolong the anagen (growth) phase,

• prevent natural shedding during the telogen phase.

As a result, instead of falling out, the lash continues to grow, becoming excessively long, thick, and heavy.

Why Eyelash Extensions Should Not Be Applied with Trichomegaly

Trichomegaly itself poses a risk to eye health. Excessively long and heavy natural lashes:

• overload the eyelid,

• may curl inward and irritate the cornea,

• cause discomfort and a constant pulling sensation.

Adding artificial lashes and adhesive increases the load and may lead to:

• ptosis (drooping of the eyelid),

• eyelid twitching,

• chronic eye irritation.

For this reason, eyelash extensions are strictly contraindicated in cases of trichomegaly.

How to Shorten Overly Long Lashes at Home?

This question is common, but the answer is very clear:

❌ You should never trim your lashes yourself if you have trichomegaly.

Improper cutting can:

• damage the hair follicle,

• cause infection,

• worsen the condition.

Anyone experiencing this issue should consult an ophthalmologist or dermatologist, who can determine appropriate treatment and, if necessary, perform professional eyelash trimming.

Eyelash Extensions After Medical Trimming – How to Do It Safely

After lashes are shortened by a medical professional, they often become:

• very thick and dense,

• short,

• stiff, which may cause discomfort for the client.

At this stage, a lash stylist can help – but only by following strict safety rules.

Recommended styling choices:

✔ Classic 1:1 method – best for camouflaging short, trimmed lashes and achieving a natural look
✔ Thickness 0.07–0.10 – minimal eyelid load
✔ Light curls and moderate lengths – comfort always comes first