The short answer
NCI lists cracked nails, swollen or painful cuticles, nail infections and yellow nails among the nail changes that can happen during cancer treatment. Two prevention steps are given: keep nails clean and cut short so you do not tear them, and wear gloves for tasks like washing dishes or cleaning.
Cracked nails, swollen or painful cuticles, nail infections and yellow nails are listed nail changes.
Keep your nails clean and cut short to avoid accidentally tearing them.
Protect your hands and nails by wearing gloves for tasks like dishes and housework.
Nail infection around the nail fold has a medical name, acute paronychia.
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The full explanation.
When to get help sooner
Call your care team straight away if the skin around a nail becomes swollen, red or painful, or if there is pus, or if you have a fever of 100.4 °F (38 °C) or higher. NCI's instruction is to call your health care team when you have signs of an infection, because infections during cancer treatment can be life-threatening and need urgent medical attention. Your team will tell you whether to come in, and where. NCI also asks you to check with them before taking anything for a fever, including aspirin, acetaminophen or ibuprofen, because those medicines can mask a more serious problem. Infection during cancer treatment is not something to try a home remedy on first. Nail infections are on NCI's list of treatment-related nail problems, and your team wants to hear about them early.
What treatment does to nails
Nails grow slowly, which means changes show up weeks after the cause and then hang around.
NCI's list of what can happen includes:
- cracked nails
- cuticles that are swollen and/or painful
- nail infections, described as acute paronychia
- yellow nails
Cuticles matter more than people realise. That thin strip of skin is a seal, and when it is swollen, split or picked at, that seal is not doing its job.
Two things NCI asks you to do
The prevention advice is refreshingly short.
Keep your nails clean and cut short to avoid accidentally tearing them.
Long nails catch on things. A torn nail leaves the nail bed exposed, and during treatment that is an opening you would rather not have. Short and filed smooth is the goal, not a particular look.
Protect your hands and nails by wearing gloves — when you wash the dishes, for example, or clean the house.
Washing up gloves are cheap and boring and they take repeated wet-and-detergent exposure off nails that are already fragile. Gardening gloves do the same job for soil, which carries its own risks during treatment.
Small habits that help
Building on those two instructions:
- Keep nail clippers and a file in one obvious place, so trimming happens before nails get long.
- Buy a couple of pairs of gloves so a damp pair does not become an excuse.
- Try not to pick or push back cuticles.
- Check your fingertips now and then — you will notice a change earlier than someone else will.
Why this is worth the bother
It seems like a small side effect next to everything else you are dealing with. The reason it earns attention is that chemotherapy can lower your body's ability to fight infection, so a break in the skin at the nail matters more than it did before.
Nails also affect daily life more than expected. Sore fingertips make buttons, keys, phones and jar lids into obstacles.
Talking to your team about it
Ask which of your drugs are known to affect nails, and what your team wants you to do if a nail lifts or tears. Get the answer in advance, since these things tend to happen on a Saturday.
On manicures, NCI is not neutral: its advice for preventing nail problems during treatment is to avoid getting manicures and pedicures. Ask your team how long that applies for in your case.
Words to know
Tap any term to see what it means.
Common questions
What nail problems can treatment cause?
NCI lists cracked nails, cuticles that are swollen or painful, nail infections, and yellow nails.
How do I lower the risk of an infection?
Keep your nails clean and cut short so you do not accidentally tear them, and wear gloves when you wash dishes or clean the house.
Why does cutting them short help?
NCI links short nails to avoiding accidental tears. A torn nail creates an opening at the nail bed.
What is paronychia?
It is the term NCI uses for a nail infection in this context. Acute paronychia is the version that comes on quickly.
Questions to ask your doctor
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Sources last checked: 2026-08-11 what this meansLast updated: 2026-08-20Next planned review: 2027-08-11
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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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