The short answer
Cancer treatment can affect a woman's sexual health — for example, causing vaginal dryness, discomfort during sex, or lower interest. Many changes are temporary, while others last longer. Products, exercises, and support can help make sex more comfortable, and a care team can explain the options.
Cancer treatment can cause vaginal dryness, discomfort during sex, or lower interest in sex.
Chemotherapy, hormone therapy, and pelvic radiation can lower estrogen and affect vaginal tissue.
Surgery such as a mastectomy or ostomy can change how a woman feels about her body.
Some pain and depression medicines can lower interest in sex.
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The full explanation.
The simple version
Women being treated for cancer may notice changes that affect their sexual life. These can happen during treatment and sometimes after. According to the National Cancer Institute (NCI), you may not have the same energy or interest in sex that you had before. Even so, feeling close to a partner often stays important. Some changes are temporary and improve once treatment ends. Others may last, or may start after treatment.
Whether your sexual health is affected depends on several things. They include the type of cancer and treatment, the dose and length of treatment, your age, the time since treatment, and other health factors.
How treatments can affect sexual health
NCI describes several ways treatment can affect a woman's sexual health.
- Chemotherapy can lower estrogen and cause primary ovarian insufficiency. That can bring hot flashes, irregular or absent periods, and vaginal dryness that makes sex difficult or painful. It can also affect vaginal tissue.
- Hormone therapy can lower estrogen. That leads to hot flashes, irregular or absent periods, and vaginal dryness.
- Radiation therapy to the pelvis can lower estrogen and cause vaginal dryness. It can also cause vaginal narrowing (stenosis), thinning (atrophy), and itching or burning that make sex uncomfortable.
- Surgery for gynecologic cancers can affect sexual life. Surgery such as a mastectomy or ostomy can change how you feel about your body.
- Medicines such as opioids and some depression medicines can lower interest in sex.
Ways to manage sexual health issues
Most women can be sexually active during treatment, but NCI advises confirming this with your doctor. At times when the risk of infection or bleeding is higher, you may be advised to avoid sexual intercourse.
Your care team can help you learn about medicine and exercises to make sex more comfortable, such as:
- vaginal gels or creams for dryness, itching, or burning.
- vaginal lubricants or moisturizers.
- vaginal estrogen cream, which may suit some types of cancer.
- a dilator to help prevent or reverse scarring after radiation.
- exercises for the pelvic muscles to lower pain and improve blood flow.
Your team can also help with related side effects such as pain, fatigue, and low mood. They can tell you what protection or contraception is advised. They can point you to professionally led support groups and counseling. Sharing your concerns with people you trust can help too. Your care team is the best guide to what your treatment may mean and what can help.
When to get help sooner
- Call 911 or go to an emergency department if vaginal bleeding is heavy and will not stop, or you feel faint with it.
- Call your care team the same day if you bleed from the vagina when you are not having a period, or bleeding after using a dilator keeps going for more than a few minutes. NCI treats unexpected bleeding as a reason to call.
- Do not wait for the clinic to open if chills begin or your temperature reaches 100.4°F (38°C) or higher while you are on treatment. Use the day-or-night number your team gave you, or go to an emergency department. CDC describes fever during chemotherapy as a medical emergency.
- Call your care team within a day or two if vaginal itching, burning, or a change in discharge is new, or intercourse stays painful even with a lubricant.
Words to know
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Common questions
Why does cancer treatment cause vaginal dryness?
Chemotherapy, hormone therapy, and radiation to the pelvis can lower estrogen levels, which can cause vaginal dryness. Pelvic radiation can also affect vaginal tissue, causing narrowing, thinning, or irritation that makes sex uncomfortable.
What can help with painful or uncomfortable sex?
NCI notes options such as vaginal gels or creams, lubricants or moisturizers, vaginal estrogen cream that may suit some cancers, a dilator to help with scarring, and pelvic muscle exercises. A care team can advise what is right for you.
Can I be sexually active during treatment?
Most women can be sexually active during treatment, but you should confirm this with your doctor. At times when the risk of infection or bleeding is higher, you may be advised to avoid sexual intercourse.
Do I need protection during treatment?
Condoms may be advised because some treatments can remain in vaginal secretions for a time. If you are of childbearing age, contraception may be advised during and for a period after treatment. Ask your care team what is recommended.
How can I cope with body-image changes?
Surgery such as a mastectomy or ostomy can change how you feel about your body. Your care team can help you know what to expect and how to adjust, and support groups and counseling can help.
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Sources last checked: 2026-08-13 what this meansLast updated: 2026-08-13Next planned review: 2027-01-14
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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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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.
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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