Editor’s note: This article consolidates two pieces by Diane Mapes that were originally published by Fred Hutch News Service in July 2016 and later republished by URevolution with permission. Mapes’ first-person experience and attributed reporting are preserved. URevolution substantively reviewed and updated the general medical information on September 21, 2026 using current cancer and sexual-health sources. The medical information below is general information, not individual medical advice.
Cancer treatment can change sex in ways people are often unprepared for. Desire can drop. Touch can feel different. Sex can hurt. Erections, lubrication, orgasm, body confidence and energy can all change. Surgery, chemotherapy, radiation, hormone therapy, medication, pain and fatigue can each play a part.
None of that follows one script. Some people notice few sexual changes. For others, they last months or years, and some changes can be permanent. Your goal does not have to be returning to the sex life you had before cancer. It might be finding a different kind of intimacy, making sex more comfortable, understanding a changed body, talking more openly with a partner, or deciding that sex simply is not a priority right now. Current guidance from the American Cancer Society, the National Cancer Institute and Macmillan Cancer Support all make the same basic point: sexual effects vary, and they deserve to be treated as part of quality of life.
When cancer treatment changes your sexual self
Sex after cancer treatment was the furthest thing from my mind when a breast cancer surgeon told me I needed a double mastectomy five years ago.
Maybe it shouldn’t have been.
My doctors didn’t bring it up, so neither did I. I had reached out to other patients, so I had some idea of what might be coming. In my case, surgery left my chest numb. Losing my breasts and sensation was only part of it. Chemo, radiation and tamoxifen tamped down a sexual desire that had once felt automatic.
I remember my oncologist telling me about hair loss. She mentioned hot flashes when I started tamoxifen. What I remember far more clearly is what happened once I was taking it: I felt as though my sexual antenna had been snapped off. If someone was sending out signals, I could no longer read them. It was like everybody had suddenly started speaking a language I had forgotten.
That was my experience. It is not a forecast for everybody who has cancer, a mastectomy or hormone therapy. But it captures something clinical descriptions often miss: sexual side effects can affect identity, confidence, memory, dating and relationships as much as mechanics.
Why cancer can change sex
Different treatments affect sexuality in different ways. Surgery can alter anatomy, nerves, sensation or how you feel about a part of your body. Pelvic radiation can affect tissue, blood vessels and nerves. Chemotherapy can bring fatigue, nausea or hormonal changes. Hormone therapy can reduce sexual desire and can contribute to hot flashes, vaginal dryness or erection changes, depending on the treatment. Pain, bowel or bladder changes, sleep problems, anxiety, low mood and plain exhaustion can matter too.
The American Cancer Society’s sexual-side-effects resources and the National Cancer Institute’s information on sexual health for people with female reproductive organs and people with male reproductive organs set out the treatment-specific possibilities in more detail.
There is no useful reason to turn that list into a checklist of things that are destined to go wrong. Side effects vary by cancer, treatment, dose, anatomy, age, other health conditions and the person themselves.
Low libido after cancer
Low desire can have more than one cause. Fatigue, pain, nausea, stress, depression, anxiety, treatment-related hormone changes and some medicines can all affect whether sex feels appealing. Sometimes sex simply drops down the priority list while someone is trying to get through treatment.
Hormone therapy deserves particular attention because the effect can be substantial for some people. The National Cancer Institute lists loss of interest in sex among the common side effects of hormone therapy for breast cancer. If a cancer medicine is affecting your sexual well-being, talk with your oncology team about the problem rather than changing or stopping treatment on your own.
Writer Ada Harrigan describes this from the inside in her first-person account of Tamoxifen, breast cancer treatment and loss of libido. Her experience is hers, not a promise about what another person will feel, but it gives language to the strange absence of desire that a clinical side-effect list cannot.
Pain, dryness and physical discomfort
Sex that used to feel easy can become uncomfortable or painful. Treatment-related hormonal changes can contribute to vaginal dryness. Pelvic radiation and some surgeries can cause longer-term changes in tissue or sensation. Cancer treatment can also affect bowel and bladder function, skin, scars or mobility, all of which may change what feels possible or comfortable.
Michele Longabaugh, interviewed in the original Fred Hutch reporting, described severe sexual and pelvic side effects after treatment for anal cancer. Her frustration was not simply that intercourse had become difficult. “This is more than just a body part missing,” she said. “This has changed my life.”
Pain during sex is worth bringing to a clinician rather than trying to push through it. Depending on the problem, useful support may come from an oncology team, primary-care clinician, gynecology or urology service, menopause specialist, pelvic-health physiotherapist or sexual-health clinician. What is appropriate depends on the cancer and treatment history, particularly when hormones are involved.
Erection, ejaculation and orgasm can change too
Cancer treatment can affect erections, ejaculation and orgasm, especially when surgery or radiation involves the pelvis or when treatment changes hormone levels. The National Cancer Institute notes that treatment can affect nerves, blood vessels and testosterone, while medicines used for pain or depression may also affect sexual desire or function.
There are medical options for some problems, but the right approach depends on what is causing the change. A person dealing with erection or orgasm changes can ask their oncology team or primary-care clinician whether a urology or sexual-health referral makes sense.
Body image after cancer is part of sexual health
Scars, mastectomy, an ostomy, hair loss, weight changes, numbness, altered breasts or genitals, medical devices and reconstruction can all change how a person feels in their body. Sometimes the difficult part is appearance. Sometimes it is sensation. Sometimes the body simply stops feeling familiar.
After my mastectomy, the numbness mattered as much as the visual change. Dating felt complicated because there was so much explaining to do before I could even get to the part where two people decide whether they like each other. I was still me, but I had to learn what this version of my body felt like.
There is no compulsory “body confidence” phase that everyone has to reach. Some people want to reclaim sexual attention quickly. Others need time. Some prefer clothes on, different lighting or different kinds of touch. Some do not want a changed part of their body touched at all. Those preferences can change.
Intimacy does not have to mean intercourse
One of the most useful ideas from nurse practitioner Leslie Heron, interviewed for the original article, was to stop treating penetration as the only meaningful measure of a sex life.
When pain, tenderness or lack of response makes sex feel like a dead end, Heron sometimes encouraged people to start with something much less loaded: holding hands, holding each other, rubbing, kissing or being physically close without intercourse. That can include massage, masturbation, mutual pleasure, nonpenetrative sex or simply affectionate touch. It can also mean rest. There is no requirement for closeness to escalate into sex.
Jon Dibblee, another person interviewed in the original reporting, put it more simply: “It’s the intimacy. To me, that’s the best part of the whole thing.” His body and sexual function had changed after years of cancer treatment, but closeness with his partner still mattered.
Learn what your body likes now
Heron also suggested something practical: map the body you have now. Treatment can leave one area numb and another hypersensitive. A type of touch that used to feel good may now hurt, while another part of the body may become more important.
You can explore that without turning it into a performance test. Notice what light, medium or firmer touch feels like on different areas. Notice what feels good, neutral, irritating, unsafe or simply unfamiliar. If you have a partner, that information gives you something concrete to communicate.
This can be useful when dating too. Knowing what feels comfortable can make it easier to tell a new partner what you want, what you do not want and what you are still figuring out.
Talking with a partner when sex has changed
Cancer can put two people into unfamiliar roles. A partner may have spent months helping with appointments, medication, drains, dressings or everyday care, then struggle to shift from caregiver mode back into sexual intimacy. The person who had treatment may fear pain or rejection. A partner may be frightened of hurting them. Both people can end up waiting for the other to say something.
Heron told Mapes that some couples stop trying after a few difficult sexual experiences because neither person knows how to talk about what happened. That silence can make the next attempt feel even more loaded.
Talk outside the bedroom if that feels easier. Name the actual problem: desire has changed; penetration hurts; erections are unreliable; touch on a scar feels unpleasant; you want affection without sex; you miss sex and do want help. It is easier to work with a specific truth than with the vague sense that your relationship is somehow failing.
For a broader chronic-illness perspective, URevolution also publishes a guide to sex drive and chronic illness. If pain with penetration has become part of the problem, our article on discussing vaginismus with a partner may also be useful.
What if your partner wants sex and you do not?
Cancer does not create an obligation to resume sex. Neither does marriage, a long relationship, recovery from treatment or a partner’s patience while you were ill.
Desire mismatches can be painful without anybody being the villain. One person may miss sex and interpret its absence as rejection. The other may be exhausted, in pain, frightened, uninterested or simply changed. The conversation still has to start from consent. Pressure, guilt or “proving” that the relationship is back to normal will not make sexual intimacy safer.
If both people want to work on the mismatch, the first step may be agreeing on forms of closeness that do not carry an expectation of sex. A couples counsellor or sex therapist with cancer experience can help when conversations keep collapsing into hurt or avoidance.
What if you want sex but your body feels different?
Wanting sex and not trusting your body can be its own frustration. You may be dealing with pain, fatigue, numbness, dryness, erection changes, scars, an ostomy or fear that something will go wrong halfway through.
Start with the problem that is actually getting in the way. Sometimes that is a medical side effect that deserves assessment. Sometimes it is positioning or energy. Sometimes it is a fear that a partner will react badly to a scar or appliance. Sometimes the old sexual routine simply no longer fits.
Changing the routine is allowed. So is stopping when something hurts. So is laughing when a body does something unexpected.
LGBTQ+ people should not have to translate themselves into heterosexual cancer advice
Sexual-health information after cancer has often been written as though every patient is cisgender, heterosexual and coupled. That leaves gaps for lesbian, gay, bisexual, trans, non-binary and queer people, as well as people in non-monogamous relationships or people who are single.
The American Cancer Society now explicitly includes sexual orientation and gender identity in its cancer-and-sex guidance. Anatomy, past surgeries, current hormones, fertility goals and the kinds of sex someone actually has can all matter to treatment conversations. Good care starts with those facts rather than assumptions.
The same principle applies here. Penis does not automatically mean man. Vagina does not automatically mean woman. Intercourse is not the default measure of intimacy.
When to ask for professional help
You do not need professional treatment simply because your sex life is different after cancer. But support is worth asking for when a change bothers you, causes pain, affects your relationship, or leaves you unsure whether something is a treatment side effect.
Depending on the issue, that might mean talking with your oncology team, primary-care clinician, sexual-health service, pelvic-health physiotherapist, menopause specialist, counsellor or sex therapist, or a gynecology or urology service. The useful referral is the one that matches the problem.
If your clinician does not ask about sex, you can raise it yourself. The American Cancer Society notes that cancer-care teams do not always start these conversations. A direct question is enough: “Could this treatment be affecting my sex life, and who can help me with it?”
There is no single version of recovery
In the original Fred Hutch reporting, Dr. Karen Syrjala made a point that still holds up: people cannot always expect their bodies to work exactly as they did before cancer, but sexual intimacy and satisfaction can still be possible even when physical changes are not fully reversible.
For some people, recovery means having sex again. For someone else, it means less pain, a conversation that finally happened, a different kind of touch, a new relationship with their body, or deciding that sex is not what they want to spend energy on. Those are different outcomes, not failures to reach the same one.
My own story never resolved into a neat before-and-after. Surgery and treatment changed many things. Dating after cancer remained daunting. I did, however, discover that some embers were still there. What happened next was mine to decide.
Sources and further reading
- American Cancer Society: How Cancer Can Affect Sex and Intimacy
- National Cancer Institute: Sexual Health Issues in Women with Cancer
- National Cancer Institute: Sexual Health Issues in Men with Cancer
- Macmillan Cancer Support: Sex and Cancer
- Cancer Research UK: Sex, Sexuality and Cancer
- Fred Hutch News Service: The Sexual Aftermath of Cancer Treatment, by Diane Mapes
- Fred Hutch News Service: Your Post-Cancer Treatment Sex Rx, by Diane Mapes
