The short answer
Cancer and its treatment can change sexual health and interest in intimacy — during treatment and sometimes after. Many changes are temporary and improve when treatment ends, while others last longer. Care teams and sexual health experts can help manage these changes, and intimacy and closeness often stay important.
Cancer treatment can change sexual health during treatment and sometimes after.
Many changes are temporary and improve when treatment ends; some last longer.
Whether sexual health is affected depends on the cancer, treatment, dose, age, and other factors.
Most people can be sexually active during treatment, but should confirm this with their doctor.
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The simple version
This page is for anyone having cancer treatment who has noticed changes in their sex life. It covers what causes these changes and where to find help.
People being treated for cancer may notice changes that affect their sexual life, during treatment and sometimes after. According to the National Cancer Institute (NCI), you may not have the same energy or interest in sexual activity that you had before treatment. At the same time, feeling close to and being intimate with a spouse or partner often stays important.
Many changes are temporary and improve once treatment ends. Others may last longer or may begin after treatment.
What affects whether sexual health changes
Whether your sexual health is affected depends on several things:
- the type of cancer.
- the type of treatment or treatments.
- the amount (dose) of treatment.
- the length of treatment.
- your age at the time of treatment.
- how much time has passed since treatment.
- other personal health factors.
Health conditions such as heart disease, high blood pressure, diabetes, and smoking can also play a role.
Common kinds of changes
Different treatments can bring different changes. NCI notes that:
- Some treatments can lower hormone levels or interest in sex.
- Radiation or surgery in the pelvic area can affect sexual function.
- Some medicines, including certain pain and depression medicines, can lower sex drive.
- Physical changes from treatment, such as after breast or ostomy surgery, can affect how a person feels about their body.
Related side effects — such as pain, fatigue, hair loss, sadness, or trouble sleeping — can also affect sexual health. Speaking up about them can help you get support.
Staying sexually active during treatment
Most people can be sexually active during treatment, but NCI advises checking with your doctor first. There may be times when your risk of infection or bleeding is higher. Your team may suggest you avoid sex during those times.
Depending on the treatment, your team may also suggest:
- using a condom, because some treatments can stay in semen or vaginal fluids for a while.
- using birth control (contraception) to prevent pregnancy.
Ways to manage and get support
People on your health care team have helped others through this and can offer suggestions. You may also want to talk with a sexual health expert. Your team can help you:
- learn about treatments and options for specific problems.
- manage related side effects such as pain, fatigue, and low mood.
- learn what protection or contraception is advised.
- find professionally led support groups and counseling.
Sharing your feelings with people you trust can also help.
When to get help sooner
- Call your care team the same day if you bleed after sex and it does not stop within a few minutes, or you bleed from the vagina outside your period. NCI lists both as reasons to call.
- Get help immediately — call your team's day-or-night line, or go to an emergency department — if chills start or your temperature reaches 100.4°F (38°C) or higher while you are having treatment. CDC treats a fever during chemotherapy as a medical emergency, because it may be the only sign of a serious infection.
- Call your care team right away, day or night, if passing urine begins to hurt during treatment. That can be a sign of infection, and NCI says infections during cancer treatment can need urgent medical attention.
- Call your care team within a day or two if sex has turned painful, or a new sore, lump, or rash shows up on the genital skin.
Common questions
Will cancer treatment change my sexual health?
It might. Whether your sexual health is affected depends on the type of cancer and treatment, the dose and length of treatment, your age, and other factors. Many changes are temporary, but some can be long term.
Is it safe to be sexually active during treatment?
Most people can be sexually active during treatment, but you should confirm this with your doctor. At certain times — for example, when the risk of infection or bleeding is higher — you may be advised to avoid sexual activity.
Are the changes permanent?
Many changes are temporary and improve once treatment ends. Others may be long term or may start after treatment. Your care team can explain what to expect for your treatment.
Do I need to use protection?
Sometimes. Condoms may be advised because some treatments can remain in semen or vaginal secretions, and contraception may be advised to prevent pregnancy during treatment. Ask your care team what is recommended.
Who can help me with these changes?
Your doctor, nurse, or social worker can help, and you may also talk with a sexual health expert. Professionally led support groups and counseling can help you cope.
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Sources last checked: 2026-08-13 what this meansLast updated: 2026-09-30Next 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, and this 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 then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. 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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