A fresh set of lash extensions looks wonderfully even. Two weeks later, you may notice a few gaps. Is that normal, or has something gone wrong?

Eyelash extensions do not have one guaranteed expiry date. Individual extensions shed as the natural lashes they are attached to complete their cycle. Many people schedule infills at roughly two to three weeks to maintain an even-looking set, while the last remaining extensions may stay longer. Your own lash growth, the application and your routine all make a difference.

The American Academy of Ophthalmology describes extensions as typically lasting around three to four weeks as natural lashes shed. That does not mean a set will look freshly applied for that entire period. There is a difference between having some extensions left and having a balanced, full-looking result.

You might love the look at day ten and feel ready for maintenance after day eighteen. Someone else may prefer a softer, more grown-out appearance and wait longer. Both experiences can be normal.

Be cautious of anyone promising that every client will keep a perfect set for a fixed number of weeks. Retention is affected by factors no technician can fully control.

Each extension is attached to an individual natural lash or suitable group of natural lashes, depending on the technique. Your natural lashes grow, rest and eventually shed. When one sheds, the attached extension usually goes with it. That is why finding a single extension attached to a natural lash is not, by itself, evidence of a problem.

Not every lost extension is natural shedding, however. Adhesive performance, product use, eye rubbing, sleeping habits, application quality and the condition of the natural lashes can all affect the result.

If a large number of extensions come away unusually quickly, contact your salon rather than trying to glue anything back on at home. A technician can review possible causes and assess whether the remaining set can be maintained.

Natural lash cycle. We all shed lashes, and shedding is not identical from week to week. Some clients notice more visible gaps at certain times than others.

Application and suitability. Extensions that are too heavy for the natural lashes or poorly attached can cause trouble. Careful isolation and an appropriate design matter.

Cleansing. Lashes need to be kept clean. A build-up of make-up, skin oils and debris around the lash line is not a good reason to avoid washing your eyes. Your technician can recommend a suitable cleanser and technique.

Habits. Rubbing your eyes, pulling at an uneven lash or repeatedly pressing your face into a pillow can interfere with the set and irritate the lash line.

Products and environment. Different adhesives have different guidance. Ask which products are compatible with your set, particularly if you use rich eye creams, make-up removers or spend lots of time swimming.

Infills replace extensions that have shed and help restore a balanced look. Many salons suggest checking your set after approximately two to three weeks, although this is an appointment-planning guide, not a medical or technical rule.

Whether an infill is possible depends on how many extensions remain, their position, their condition and the health of your natural lashes. If too much of the original set has grown out or shed, a new set may be more appropriate.

If you know you have a wedding, trip or important event coming up, book with enough time for a consultation rather than trying a new style the night before. Ask the salon how it schedules infills and when a fresh set is recommended.

Clean your lash line gently using a product approved by your technician. Rinse and dry as advised, then brush with a clean lash wand when appropriate. Gentle is the key word: the aim is to remove build-up, not scrub the extensions into place.

Avoid tugging at lashes that seem to point the wrong way. If one extension is twisting or feels uncomfortable, arrange a professional check. Never use household glue, tweezers or improvised removers near your eye.

Ask about water and steam guidance for the particular adhesive used during your appointment. Older online advice often gives a blanket rule about keeping extensions dry for 24 or 48 hours, but the appropriate instructions can vary by product and technique. Follow your technician’s current product-specific advice.

An occasional shed extension and a gradually less dense lash line are expected. Pain, persistent redness, swollen lids, discharge or changes in vision are not normal aftercare concerns to ignore. Stop using irritating eye products and seek prompt medical advice if symptoms occur. Do not attempt to remove extensions yourself if you suspect an allergic reaction.

The American Academy of Ophthalmology notes possible risks including allergic reactions, infection and damage to natural lashes. A careful choice of technician and good hygiene reduce avoidable risks but cannot make them disappear entirely.

There is no universal calendar that says everyone must take a break after a particular number of appointments. What matters is how your natural lashes and eye area are doing. If your lashes are stressed or your eyelids are uncomfortable, speak with your technician and, for symptoms affecting your eyes, a healthcare professional.

If you decide to stop wearing extensions, allow the remaining lashes to shed or arrange safe professional removal. Resist the urge to pull off the last few. Your natural lash line deserves the same gentle approach at the end of a set as at the beginning.

Why do I have gaps after two weeks? Natural lash shedding can create gaps. Your routine and application may also play a part; your technician can help assess the pattern.

Can I make extensions last six weeks without infills? Some lashes may remain for weeks, but a full, even appearance is unlikely to be identical throughout that period. No duration can be guaranteed.

Do volume lashes always last longer than classic lashes? No. The technique alone does not determine retention. Natural shedding, design, attachment and care also matter.

Can I remove just the stragglers myself? Do not pull or use DIY adhesive remover around your eyes. Ask for professional removal.

If you are considering your first set or wondering when to refresh an existing one, see the eyelash extension treatments at InHype Beauty. We are based in Mayfair, London. Choose an appointment that leaves time to discuss your current lashes and the finish you would like to maintain.