Why are my eyelashes falling out? Understanding the causes and solutions

Are your eyelashes getting thinner, falling out more frequently, or suddenly gathering on your makeup removal pad? Up to a certain point, this is normal – the natural eyelash cycle ensures that some eyelashes fall out and grow back every day. Nevertheless, stress, hormones, illnesses, or your beauty routine can significantly increase the loss.

If you want to strengthen your eyelashes in the long term, a combination of a gentle care routine, a balanced diet, and a hormone-free, prostaglandin-free eyelash serum like the natural eyelash serum from Sins 'n Lashes helps, which nourishes directly at the lash line and supports the natural growth cycle.

For even more depth, you can find our guides "Nutrition for long eyelashes" and "Eyelash care at any age".

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Key Takeaways

• It is normal to lose some eyelashes daily – on average about 1–5 eyelashes per eye, because each eyelash goes through its own growth cycle.
• Stress, hormonal fluctuations, and illnesses (e.g., thyroid diseases or autoimmune diseases) can disrupt this cycle and lead to increased eyelash loss.
• Extensions, waterproof mascara, harsh makeup removal, and frequent dyeing weaken the eyelashes mechanically and chemically, leading to breakage and loss.
• A balanced diet with sufficient protein, biotin, iron, zinc, Vitamin D, and Omega‑3 supports the hair follicles – however, according to a review on biotin for hair loss, high-dose biotin supplements only show clear benefits in cases of genuine deficiency.
• Home remedies like castor oil can care for the hair surface, but according to Medical News Today: Castor Oil for Eyelash Growth, there are no high-quality studies proving assured eyelash growth.
• Eyelash serums with prostaglandin analogs can prolong the growth phase but are associated in studies with side effects such as redness, skin discoloration, and volume loss of fat around the eyes (Review on Prostaglandin Analogs in Eyelash Serums).
• Natural, hormone-free eyelash serums with peptides, biotin & panthenol are gentler and are particularly suitable for sensitive eyes and a long-term routine – read more in our expert article on hormone-free eyelash serums.

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What is still normal? How many eyelashes can fall out?

On a healthy eye, there are approximately 90–160 eyelashes on the upper lid and about 75–80 on the lower lid. Dermatologists and lash experts assume that it is normal if you lose about 1–5 eyelashes per eye per day – without visible gaps appearing.

Eyelash loss is usually harmless if:

• you only find individual eyelashes on pillows, makeup removal pads, or in the shower
• the lash line still looks dense overall
• no additional symptoms like itching, redness, burning, or severe fatigue occur

It becomes critical if:

• you lose significantly more eyelashes than before over several weeks
• visible gaps form in the lash line
• eyebrow or scalp hair falls out additionally
• your eyelids are red, swollen, or flaky

Then you should see a general practitioner, ophthalmologist, or dermatologist instead of reacting only cosmetically.

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The Natural Eyelash Cycle: Anagen, Catagen, Telogen

Like the hair on your head, your eyelashes follow a fixed cycle of growth, transition, and rest:

1. Anagen phase (Growth phase, approx. 30–45 days)
   The eyelash grows actively. Its later length is largely determined in this phase.
2. Catagen phase (Transition phase, approx. 2–3 weeks)
   Growth stops, the follicle shrinks. The eyelash is fully formed.
3. Telogen phase (Resting phase, up to approx. 100 days)
   The eyelash rests until it finally falls out and a new eyelash grows back in the anagen phase.

Because not all eyelashes are in the same phase at the same time, you never lose "all at once", but only individual ones – which is exactly why natural eyelash loss often seems harmless until other factors are added.

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Inner Causes: Stress, Hormones & Illnesses

Stress & Telogen Effluvium

Severe or persistent stress can trigger a so-called Telogen Effluvium: Many hairs (including eyelashes and eyebrows) jump prematurely into the resting phase and fall out increasingly 2–3 months later. The picture is rather diffuse instead of spotty baldness.

What helps:

• Identify & reduce stressors
• Prioritize sleep and recovery
• Get psychological or medical support if necessary
• Establish a gentle eyelash care routine in parallel (see routine below)

Hormonal Changes

In phases of life such as puberty, pregnancy, breastfeeding, or menopause, your hormone levels change significantly. Falling estrogen levels can make eyelashes thinner, drier, and more brittle.

You can learn how to adapt your routine to different phases of life in our guide to eyelash care at any age.

Thyroid Disorders

The thyroid controls your metabolism – and thus also the hair cycle. Both hypothyroidism (underactive thyroid) and hyperthyroidism (overactive thyroid) can contribute to hair loss, including on eyelashes and eyebrows. An article in the Cleveland Clinic Journal of Medicine describes e.g. cases where pronounced eyelash loss was a sign of uncontrolled hypothyroidism:
"Hypothyroidism, eyelash loss" – Cleveland Clinic Journal of Medicine

Warning signals:

• simultaneous loss of eyelashes, eyebrows, and scalp hair
• severe fatigue, weight gain or loss, sensitivity to cold
• very dry skin, brittle nails

If suspected, blood tests (TSH, fT3, fT4) via your doctor are advisable.

Autoimmune & Skin Diseases

Diseases like Alopecia areata, Lupus, or chronic dermatitis/blepharitis can attack eyelash follicles directly. Typical are:

• inflamed, red, flaky lid margins
• spotty or streak-like bald patches in the lash line
• recurring complaints despite care

In such cases, ophthalmological or dermatological treatment is crucial – pure cosmetics are not enough here.

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Outer Causes: Extensions, Makeup & Removal

Eyelash Extensions & Lash Lifting

Eyelash extensions strain your natural lashes in several ways:

• extensions that are too heavy or too long
• glue that adheres to the skin instead of just the lash
• frequent refills without regeneration breaks

This can lead to premature shedding, breakage, and long-term thinning. Therefore, give your eyelashes extension-free phases and support them during this time with nourishing products like the Eyelash Serum from Sins 'n Lashes, which is specially formulated without prostaglandin analogs.

You can read how to protect your natural lashes particularly well after extensions in our guide "Properly caring for lashes after extensions".

Mascara – especially waterproof formulas

• Waterproof mascara is often difficult to remove and tempts one to rub vigorously – a clear risk factor for brittle eyelashes.
• Old mascara (older than approx. 3–6 months) increases the risk of germ contamination and irritation.

In everyday life, rely on nourishing formulas like the Growth Mascara from Sins 'n Lashes, which visually thickens lashes and nourishes them at the same time. It is best to save waterproof products for special occasions.

Dyeing, Lifting & Chemical Treatments

Eyelash tinting and lash lifting use oxidation and perm chemicals. With improper use or too frequent treatments, they can:

• weaken the hair structure
• irritate the lid margin
• trigger allergic reactions

Such treatments belong in professional hands – and your eyelashes need recovery phases with gentle care between appointments.

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Nutrition & Nutrients: How important are Biotin & Co.?

Your eyelashes consist predominantly of keratin, a protein. Important for healthy hair follicles are, among others:

• sufficient protein
• Biotin (Vitamin B7)
• Iron & Zinc
• Vitamin D, Vitamin E, Vitamin C
• Omega‑3 fatty acids

A balanced diet – as described in the post "Nutrition for long eyelashes" – supports hair metabolism.

On the question of Biotin supplements:
A current dermatological review summarizes that high-dose biotin supplements clearly benefit mainly when an actual deficiency or certain hair diseases are present. For healthy people with a normal diet, an additional benefit for hair or eyelash growth is not scientifically well proven:
"Biotin for Hair Loss: Teasing Out the Evidence" – JCAD/PMC

Conclusion:
Rely on good basic nutrition instead of individual "miracle capsules".

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Home Remedies & Oils: What's the truth about Castor Oil & Co.?

Castor oil is often cited as an insider tip for longer eyelashes. The current status:

• According to Medical News Today, there are currently no high-quality clinical studies proving that castor oil safely and significantly accelerates eyelash growth.
• Dermatologists report that oils can make the surface appear smoother and shinier, but that is not synonymous with more or longer lashes.
• Applied directly to the eye, thick oil can clog pores or trigger irritation.

Therefore, formulated serums, in which nourishing oils are combined in moderate amounts with peptides, panthenol, and vitamins (as with professional eyelash serums), are generally more controlled and better tolerated than pure home remedies.

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How to prevent eyelash loss: Your daily care routine

Common mistakes that weaken your lashes

• Rubbing eyes (especially when removing makeup or when tired)
• Sleeping with mascara or eyeliner
• Daily use of waterproof mascara without gentle removal
• Permanent extensions without regeneration phases
• Rarely cleaned brushes and eyelash curlers

Gentle, everyday eyelash cleaning

1. Always remove makeup in the evening – no exceptions.
2. Apply an eye-friendly makeup remover to a cotton pad, let it sit on the closed eye for a few seconds, then wipe gently downwards instead of rubbing.
3. Gently comb through eyelashes with a clean mascara brush to remove residues.
4. Clean tools like eyelash curlers and brushes regularly with mild cleanser.

You can find a detailed step-by-step guide in the post "Perfect Eyelash Care".

Using eyelash serums wisely

A good, prostaglandin-free eyelash serum can sensibly complement your routine:

• Peptides support keratin production in the follicle
• Panthenol & plant extracts nourish hair and lid margin
• Biotin & amino acids strengthen the hair structure

How to use the Sins 'n Lashes Eyelash Serum correctly:

1. In the evening after facial cleansing, completely remove makeup from the eye area.
2. Draw a thin line directly at the lash line of the upper lid with the applicator – like a fine eyeliner.
3. Apply once daily, for at least 8–12 weeks. Afterwards, you can switch to 2–3 applications per week for maintenance.

Serums without prostaglandin analogs take a little longer, but are often significantly better tolerated by sensitive eyes and suitable for long-term use. You can also find a comparison of active ingredient classes in the article "Why you should use an eyelash serum".

If you notice that your eyelashes are getting thinner due to stress, extensions, or incorrect makeup removal, a consistent care routine is worthwhile: The Sins 'n Lashes Eyelash Serum strengthens the eyelashes at the root, supports the natural growth cycle, and helps make eyelashes appear fuller in the long term – ideal as a daily step if you want to reduce eyelash loss and build up eyelash structure at the same time.

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When you should definitely see a doctor

Seek ophthalmological or dermatological advice if:

• eyelash loss occurs suddenly and massively
• visible gaps form in the lash line within a short time
• your eyes burn, hurt, are severely red, or become inflamed
• eyebrow or scalp hair falls out additionally
• you have known thyroid, autoimmune, or skin diseases and notice new eyelash problems

Professional diagnostics (e.g., blood tests, skin findings, biopsy if necessary) are then more important than any cosmetic measure.

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FAQ: Common questions about eyelash loss

How long does an eyelash live?

A single eyelash goes through a total cycle of about 4–6 months, consisting of growth, transition, and resting phases. After that, it falls out and is replaced by a new eyelash.

How many eyelashes can I lose per day?

In healthy people, approximately 1–5 eyelashes per eye per day are considered normal physiological loss. If you lose significantly more or notice gaps, it is worth searching for the cause.

Does Biotin surely help against eyelash loss?

Biotin is important for protein and keratin metabolism. However, the review on biotin for hair loss linked above shows: a clear additional benefit is mainly proven in deficiency states and certain hair diseases, not in healthy people with a normal diet.

Do home remedies like castor oil work just as well as a serum?

So far, there are no solid clinical studies clearly showing that castor oil safely and significantly accelerates eyelash growth. It can care for the surface, but formulated serums with peptides, vitamins, and controlled oil proportions are usually more targeted and better tolerated – especially on the sensitive lid margin.

Are eyelash serums with prostaglandin analogs dangerous?

Prostaglandin analogs like Bimatoprost have been proven to prolong the growth phase of eyelashes and make them longer and denser. At the same time, the safety review on prostaglandin analogs describes side effects such as eye redness, skin discoloration, and periorbital fat loss. Such products therefore belong in medically supervised applications, not in an uncritical, permanent cosmetic routine.

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Conclusion: Understanding eyelash loss – and acting targetedly

Eyelash loss is not automatically a drama – but it is also not always just a "purely cosmetic issue". The natural cycle ensures some loss every day. However, if stress, hormonal changes, illnesses, or an aggressive beauty routine are added, the loss can increase significantly.

You can do a lot to protect your eyelashes:

• gentle, consistent makeup removal
• conscious use of mascara, eyelash curlers & extensions
• nutrient-rich, balanced diet
• a well-thought-out care routine with a hormone-free, prostaglandin-free serum like the Sins 'n Lashes Lash Serum
• timely medical clarification in case of severe, sudden, or inflammatory eyelash loss

This is how you combine beauty, health, and evidence – and give your eyelashes the best chances to remain dense, strong, and healthy in the long term.

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Sins 'n Lashes Beauty Editorial Team

The Sins 'n Lashes Beauty Editorial Team consists of a team of beauty experts, cosmetic formulators, and dermatologically trained specialist authors. Our focus:

• Development of hormone-free, prostaglandin-free eyelash and brow serums "Made in Germany"
• Understandable, evidence-based education on eyelashes, eyelash serums, and eye care
• Honest product promises without exaggerated claims

This article does not replace medical advice. In case of persistent or severe eyelash loss, pain, or inflamed eyes, please contact an ophthalmologist or a dermatologist.