Losing your eyelashes during cancer treatment can feel like a small thing on paper and a big thing in the mirror. Lashes frame the face, and for many people their absence is a daily reminder of what they are going through. If you are feeling that, you are not alone, and it is completely understandable.
This article explains why lashes can fall out during treatment, what usually happens afterward, and gentle ways to care for your eyes and lashes in the meantime. It is general information, not medical advice. Your oncology team knows your treatment best, so please check with them before trying anything new near your eyes. For a broader look at lash loss, see our guide to thin or falling eyelashes.
Key takeaways
- Chemotherapy, radiation and some other cancer treatments can cause eyelash and eyebrow loss, called madarosis [1][3].
- Most chemotherapy-related hair loss is reversible once treatment ends, though regrown hair may look different at first [1][2].
- Lashes protect your eyes, so dryness, watery eyes and irritation can be more noticeable while they are missing [3].
- Check with your oncology team before using any product near your eyes, and tell them about pain, redness, discharge or vision changes [1].
Why chemotherapy can affect your eyelashes
Many chemotherapy drugs target cells that divide quickly. Hair follicles are among the fastest-dividing cells in the body, which is why hair loss is such a common side effect. The American Cancer Society (ACS) notes that treatment-related hair loss is not limited to the scalp and can include eyelashes, eyebrows and body hair [1].
Not every treatment causes hair loss, and not everyone loses their lashes. A 2024 review in the Journal of Drugs in Dermatology notes that chemotherapy, hormone (endocrine) therapies and radiation therapy can all cause eyebrow and eyelash loss [3]. The amount of loss depends on the specific medicines, the doses and the person.
Why lashes sometimes go later than scalp hair
Lashes have their own growth rhythm. The same review explains that eyelashes and eyebrows have much shorter growth phases than scalp hair and grow more slowly, with a longer resting phase [3]. Because lashes are on a different schedule, some people notice lash loss later than scalp hair loss, sometimes even toward the end of treatment or shortly after. That can be confusing, but it is not unusual.
By the numbers
- In the only study the 2024 review found that measured it (Rose et al., Journal of Drugs in Dermatology, 2024), eyebrow and eyelash loss affected 67% of breast cancer patients, and 25% of those reported new anxiety about it [3].
- The ACS notes that chemotherapy hair loss often begins about 2 to 3 weeks after the first cycle [1].
- The National Cancer Institute says hair often grows back 2 to 3 months after chemotherapy ends [2].
What to expect after treatment
The ACS states that most chemotherapy-induced hair loss is reversible once treatment is over [1]. The National Cancer Institute (NCI) says hair often grows back two to three months after chemotherapy has ended, and that it may come back very fine at first, with a different texture or color [2]. Over time, it often returns to how it was before.
Lashes and brows follow their own slower rhythm, so be patient with them. It is common for them to come back gradually and unevenly. Some people find their lashes are lighter, finer or sparser for a while.
When regrowth may be different
Radiation is a little different. The ACS notes that radiation hair loss happens only in the area being treated and is more likely to be long-term [1]. The NCI says hair in an area that received a very high dose of radiation may grow back thinner, or may not grow back [2]. If you had radiation near your eyes, ask your radiation oncologist what to expect.
The ACS also notes that hair loss from immunotherapy and targeted therapy tends to start later and recover more slowly, and is usually partial [1].
| Treatment | How it can affect hair | Typical outlook |
|---|---|---|
| Chemotherapy | Loss often starts 2 to 3 weeks after the first cycle [1] | Usually reversible; hair often returns 2 to 3 months after treatment ends [1][2] |
| Radiation therapy | Loss only in the treated area [1] | More likely long-term; high doses may cause thinner or no regrowth [1][2] |
| Immunotherapy and targeted therapy | Starts later; usually partial [1] | Recovery tends to be slower [1] |
| Hormone therapy | Thinning, usually within the first year [1] | Typically reversible [1] |
Caring for your eyes while lashes are missing
Lashes are more than cosmetic. They help keep dust and debris out of your eyes. The 2024 review notes that people with cancer-related lash loss often report dry or watery eyes, and some wear sunglasses to manage irritation [3].
- Protect your eyes outdoors. Wraparound sunglasses can help block wind, dust and bright light.
- Ask about eye drops. If your eyes feel dry or gritty, ask your care team which lubricating drops are safe for you.
- Keep lids clean and gentle. Wash your face and lids with a mild cleanser and lukewarm water, and pat dry rather than rubbing.
- Wash your hands before touching your eyes. This matters even more if your immune system is lowered during treatment.
- Do not rub. Rubbing can irritate your eyes and the new lashes coming through.
Gentle care as your lashes come back
New lashes can be fine and delicate. Treat them kindly while they settle in. Our lash care guide has more everyday ideas.
- Wait until your care team says it is okay before wearing eye makeup again, especially if your blood counts are low or you have had eye infections.
- When you do return to mascara, choose a light, easy-to-remove formula, start with new products and remove it gently every night. Our guide to mascara and makeup habits that break lashes has tips.
- Skip lash curlers, extensions, lash lifts and lash tints for now. Extensions and strip lashes use adhesive that can irritate sensitive lids; see recovering your lashes after extensions if you are considering them later.
- Be patient. Lashes cycle slowly, so it can take months for the lash line to look full again. Our article on the lash cycle explains why.
Ways to look and feel more like yourself
Some people choose to fill in the look of their lashes and brows during and after treatment, and others prefer not to. Both choices are completely valid. The 2024 review notes that people commonly use eyebrow pencils, eyeshadow and false eyelashes [3]. DermNet lists cosmetic camouflage and false eyelashes among the general options for lash loss [5].
- A soft eyeshadow or pencil smudged along the upper lash line can create the look of a lash line without glue.
- Brow pencils or powders can recreate brow shape. Some cancer centers and support organizations offer appearance workshops.
- If you want to try false lashes, ask your care team first, because lash glue sits right on the lid.
Lash products and medicines: talk to your team first
You may see lash serums advertised as a way to “get your lashes back.” Please talk with your oncology team, and ideally an eye doctor or dermatologist, before using any product near your eyes during or after treatment. Your eyes and skin may be more sensitive than usual, and some ingredients may not be right for you.
The ACS notes that topical bimatoprost, a prescription prostaglandin medicine, has been shown to improve treatment-induced eyelash and eyebrow loss [1]. Bimatoprost is sold as Latisse, an FDA-approved drug for hypotrichosis of the eyelashes, and it needs a prescription [4]. Whether it is appropriate for you is a decision for you and your doctors. Our article on Latisse vs. over-the-counter lash serums explains how prescription and cosmetic products differ.
Cosmetic lash serums are not a treatment for chemotherapy-related lash loss, and they do not replace medical care. Once your lashes have returned and your care team is comfortable with it, some people like adding a gentle conditioning step to their routine. If you go that way, many with sensitive eyes prefer a prostaglandin-free lash serum, which avoids prostaglandin analogs. Our guide to lash serum for sensitive eyes has more on choosing and patch-testing.
Looking after how you feel
Losing lashes and brows can change how you see yourself, and it is okay to grieve that. The 2024 review describes how some patients avoid social situations because of how they expect others to see them [3]. The NCI suggests talking with people who understand, including others who have been through hair loss during treatment, and asking your care team about support groups [2].
Our lash resources page lists places to find support, eye doctors and dermatologists.
When to see a doctor
Tell your oncology team or an eye doctor promptly if you notice [6]:
- Eye pain, redness, swelling or discharge.
- Changes in your vision, or sensitivity to light that does not ease.
- Eyes that feel very dry, gritty or constantly watery.
- A bump, sore or change in the skin of your eyelid.
- Any reaction after using a product near your eyes.
- Lashes or brows that have not started to return several months after treatment ends.
Seek emergency care if you suddenly lose vision or cannot move your eyes [6]. And if lash loss is affecting your mood or confidence, that is worth raising too. Supportive care for side effects like this is part of cancer care.
Frequently asked questions
Will my eyelashes grow back after chemo?
In most cases, yes. The American Cancer Society says most chemotherapy-induced hair loss is reversible once treatment is over. Lashes may return gradually and may look finer or lighter at first.
How long does it take for eyelashes to grow back after chemotherapy?
The National Cancer Institute says hair often grows back two to three months after chemotherapy ends. Lashes grow slowly and on their own cycle, so it can take several months for the lash line to look full again.
Why did my eyelashes fall out after chemo finished?
Lashes have a different growth cycle from scalp hair, with a longer resting phase, so some people notice lash loss later than scalp hair loss, even near the end of treatment. Mention it to your care team if you are worried.
Can I wear mascara or false lashes during chemotherapy?
Ask your oncology team first. Your eyes may be more prone to irritation or infection during treatment. If they say it is okay, use new products, apply them gently and remove them carefully every night.
Can I use a lash serum after chemotherapy?
Talk with your oncology team, and ideally an eye doctor or dermatologist, before using any product near your eyes. Cosmetic serums are not a treatment for chemotherapy-related lash loss. Prescription bimatoprost is a separate medical option your doctor can discuss with you.
Related reading
- Thin or Falling Eyelashes: Causes, Signs and When to Get Help
- Why Are My Eyelashes Falling Out? Common Causes
- Lash Serum for Sensitive Eyes: How to Choose and Use One
- Latisse vs. Over-the-Counter Lash Serums: What’s the Difference?
- Lash Resources: Find an Eye Doctor, Dermatologist and Support
- Lash Care: Everyday Habits for Healthier-Looking Lashes
Sources
- American Cancer Society. Hair Loss (Alopecia)
- National Cancer Institute. Hair Loss (Alopecia) and Cancer Treatment
- Rose L, Khuhro A, Minta A, et al. Eyebrow and Eyelash Loss in Patients With Cancer. J Drugs Dermatol. 2024;23(5):327-331
- AbbVie. LATISSE (bimatoprost ophthalmic solution) 0.03% Full Prescribing Information
- DermNet. Madarosis
- Cleveland Clinic. Madarosis (Eyebrow and Eyelash Hair Loss): Causes and Treatment
