The short answer
Certain chemotherapy drugs cause hair to fall out from the head and from other parts of the body. That can include the small hairs on the face. The National Cancer Institute says hair often grows back two to three months after chemotherapy ends, and comes in very fine at first.
Not every chemotherapy drug causes hair loss, and the ones that do vary in how much hair is lost.
When a drug causes hair loss, it can affect body hair as well as the hair on your head.
NCI says hair often returns two to three months after chemotherapy finishes.
The first hair to come back is usually very fine.
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The full explanation.
Why hair goes missing beyond your scalp
Most people picture chemotherapy hair loss as scalp hair. The National Cancer Institute describes something broader: some types of chemotherapy cause the hair on your head and other parts of your body to fall out. Body hair includes the fine hairs on the face.
That is the honest limit of what the federal guidance says. NCI does not publish a separate list of tips for eyebrows and eyelashes, and this page will not invent one. What it can do is lay out what NCI actually states, so you know what is guidance and what is guesswork you may read elsewhere.
Not every chemotherapy drug does this. NCI is careful with the word "some". Your regimen may cause a lot of hair loss, a little, or none. Nobody can tell you which without knowing your drugs, and your oncology nurse can.
The timeline NCI gives
For chemotherapy, NCI says hair often grows back two to three months after treatment has ended, and that your hair will be very fine when it starts to grow back.
For radiation therapy, the picture is different. Radiation causes hair loss on the part of the body being treated. NCI says hair often grows back three to six months after radiation ends. It adds a caution worth repeating exactly: if you received a very high dose of radiation, your hair may grow back thinner or not at all.
So the answer to "how long" depends on which treatment you had, and the regrowth is gradual rather than sudden.
Looking after the skin that is now bare
NCI's self-care advice for hair loss centres on gentleness and sun protection.
- Protect and care for your scalp. NCI says to use sunscreen or wear a hat when you are outside.
- Be gentle with what hair you still have. NCI suggests a hairbrush with soft bristles or a wide-tooth comb.
- Avoid hair dryers, irons, and products such as gels or clips that may hurt your scalp.
- If your scalp itches or feels tender, NCI says lotions and conditioners may help.
Some of these translate naturally to bare skin on the face: sun protection and gentleness. Anything stronger — makeup, adhesives, growth products — is a question for your team, not something federal guidance covers.
The part that is not cosmetic
NCI does not treat this as a vanity issue. It states that many people feel angry, depressed or embarrassed about hair loss. Eyebrows and eyelashes frame a face, so their absence can feel like the moment strangers start to notice that something is wrong.
If that lands hard, it is worth saying out loud at your next appointment. NCI also points people toward the Look Good…Feel Better programme for support with appearance during treatment.
The short version: some chemotherapy drugs take body hair as well as scalp hair, most of it comes back within a few months of finishing, and being upset about it is a normal reaction rather than a weakness.
If your skin becomes sore, red or broken where hair used to be, tell your care team rather than treating it yourself. Skin problems during treatment are worth a professional look.
Words to know
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Common questions
Will I definitely lose my eyebrows and eyelashes?
No. NCI says some types of chemotherapy cause hair on the head and other parts of the body to fall out. Which drugs do this, and how much hair goes, is not the same for everyone. Your oncology team knows your specific drugs and can tell you what they usually do.
When will facial hair start growing again?
NCI says hair often grows back two to three months after chemotherapy has ended. It will be very fine when it starts to come back.
Does radiation cause the same thing?
Radiation therapy causes hair loss only on the part of the body being treated, according to NCI. It says hair often regrows three to six months after radiation ends, and that after a very high dose it may come back thinner or not at all.
Is it normal to be upset about this?
Yes. NCI states plainly that many people feel angry, depressed or embarrassed about hair loss. Saying so to your nurse or doctor is reasonable, not vain.
Questions to ask your doctor
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Sources last checked: 2026-08-11 what this meansLast updated: 2026-08-11Next planned review: 2027-08-11
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Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
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How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and checked line by line against the sources listed on it. That confirms the sources support what the page says. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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