Understand · Sex + Relationships
The short answer on painful sex after breast cancer
Sex can hurt after breast cancer because treatment thins and dries the vaginal tissue, because muscles tighten to protect against pain, or because surgery left your chest, arm or shoulder sore. Stop when it hurts, use plenty of lubricant, take more time and choose positions you control. Pelvic floor physical therapy can help, and your care team or a gynecologist can look for the cause.
What to know about painful sex after breast cancer
- Stop when it hurts. Pushing through can teach your body to brace.
- Pain has several causes. Dryness, thin tissue, infection and tight muscles all play a part.
- Pelvic floor therapy is real medicine. A specialist physical therapist can help muscles relax.
- You can plan around chest and arm pain. Timing, pillows and positions make a difference.
Part of Babette's series on sex after breast cancer. For dryness, see What Helps Vaginal Dryness After Breast Cancer?
Why does sex hurt after breast cancer?
The American Cancer Society (ACS) lists dryness, thinning of the vaginal walls, hormone therapy, early menopause and more frequent bladder infections among the causes. A UK guide by sex therapists and cancer nurses says trying penetration before you're aroused and well lubricated is the most common cause of sexual pain in women, and that the body can learn to brace against it. So stop if it hurts, and tell your care team or gynecologist.
What can make sex less painful after breast cancer?
The ACS suggests spending more time on foreplay, using plenty of lubricant before any penetration, telling your partner which touches and positions hurt, and choosing positions where you control the depth and speed. Presenters at a 2024 National Comprehensive Cancer Network (NCCN) meeting also listed numbing gel (lidocaine) among the nonhormonal options.
How does pelvic floor physical therapy help painful sex?
The muscles around the vagina can tighten to protect against pain, and the UK guide notes this can happen without you noticing. The ACS says pelvic floor physical therapy teaches those muscles to relax, which can ease pain. Ask your care team or gynecologist for a referral to a pelvic floor physical therapist.
Do you need vaginal dilators after breast cancer?
Probably not, unless your team suggests them. Dilators are smooth, graduated tubes that gently stretch the vagina. The ACS says they're mainly used after pelvic radiation or some pelvic surgeries, which most women with breast cancer don't have, and should be started only when your care team says so. It notes that vibrators can do the same job.
How do you manage chest, arm or shoulder pain during sex after surgery?
The ACS suggests planning ahead, taking pain medicine about an hour before sex and using pillows for support. NCCN presenters noted that surgery, lymphedema and scarring can make some positions uncomfortable, so experiment with ones that keep weight and pressure off the sore side.
When to call your care team about a sexual side effect
- Itching, burning or a thick white discharge, which can mean a yeast infection
- Sores, blisters or warts on or around the genitals
- Bleeding after sex that's more than light spotting, or keeps happening
- Pain during sex that doesn't ease with lubricant
None of these needs to wait for your next routine visit.
If it feels like an emergency, call 911.
Questions to ask your clinician about painful sex
- What do you think is causing the pain?
- Could an infection or a skin condition be part of it?
- Would pelvic floor physical therapy help me? Can you refer me?
- Is a numbing gel or a prescription treatment an option?
- How can I protect my arm if I have, or am at risk of, lymphedema?
More from Babette on sex after breast cancer
- Why Does Breast Cancer Treatment Change Your Sex Life?
- What Helps Vaginal Dryness After Breast Cancer?
- Is Vaginal Estrogen Safe After Breast Cancer?
- Where Did My Sex Drive Go After Breast Cancer?
- How Do You Talk About Sex After Breast Cancer?
- Is It Safe to Have Sex During Breast Cancer Treatment?
- Sex and Intimacy After Breast Cancer, by founder Jasmine Jones
Sources: American Cancer Society, Managing Sexual Side Effects as a Woman with Cancer (accessed October 2026); Ballinger, Reese and Ratner, Issues with Sexuality and Sexual Function in Patients with Breast Cancer, National Comprehensive Cancer Network 2024 Breast Cancer Congress (February 2, 2024); Brandenburg, Grover and Quinn, Intimacy & Sexuality for Cancer Patients and their Partners (UK, 2010). This article is general information, written in Babette's own words, and is not a substitute for advice from your care team.
