By Casey M. · Last updated September 2026
Low estrogen causes vaginal dryness: breastfeeding keeps estrogen low while your body is busy making milk.
Quick answer: Breastfeeding keeps estrogen low, which can leave the vagina thin, dry and sore, so sex may sting or hurt. It is common and usually eases after weaning or once periods return. A vaginal moisturizer used every few days plus a gentle lube during sex can help many people. Persistent pain deserves a check-up.
TL;DR
- Low estrogen while nursing is the usual cause, not anything you did wrong.
- Moisturizer is for regular comfort, lube is for sex. Many people need both for a while.
- Go slow, take longer for arousal and stop if it hurts.
- See your provider for pain that lasts, bleeding, burning or stitches that still feel sore.
Vaginal Dryness, Breastfeeding and Low Estrogen
When you breastfeed, the hormone that drives milk supply (prolactin) keeps estrogen low. Estrogen is what keeps the vaginal lining thick, stretchy and wet. With less of it, the tissue gets thinner and makes less moisture, much like it does around menopause.
The Cleveland Clinic lists breastfeeding among the causes of vaginal dryness, and notes that more than 15% of people have dryness even before menopause. So if sex feels like sandpaper right now, you are far from alone.
Your body has also just done something huge. Tears, stitches, a C-section scar, broken sleep and a touched-out feeling from holding a baby all day can pile on top of the hormone side. None of that means something is broken.
What it can feel like
- Burning, stinging or a raw feeling during or after penetration
- Less natural wetness, even when you feel turned on
- Itching or soreness during the day
- Small tears or light spotting after sex
- Needing to pee more often, or mild discomfort when you do
How Long Does It Last?
For most people, things improve as estrogen comes back. That often happens when you cut down feeds, wean fully or your period returns. Some notice a change within weeks of weaning, while others take a few months.
If you plan to nurse for a long time, you do not have to just wait it out. The steps below can make sex and daily life comfortable in the meantime.
What Helps: Moisturizer vs Lube
These two products do different jobs, and mixing them up is one of the most common reasons people say "lube didn't help".
Vaginal moisturizer, for everyday comfort
A moisturizer is used on a schedule, often every two to three days, whether or not you are having sex. It helps the tissue hold water so it feels less tight and sore in general. A hormone-free gel like AH! YES VM vaginal moisturizing gel is a popular pick for this.
Give it a couple of weeks of regular use before you judge it. A moisturizer is an aid for comfort, not a fix for low hormones.
Lube, for sex and play
Lube goes on right before and during sex to cut friction. Postpartum tissue is delicate, so use more than you think you need and top up often. A plain water-based formula such as pjur MED Hydro Glide water-based lube is a gentle place to start.
If you like a lube that feels more like natural wetness, Blossom Organics natural moisturizing lubricant is another option. You can browse our full range of water-based and silicone lubes too.
Ingredients to skip for now
- Warming, tingling or cooling lubes
- Added fragrance or flavor
- Numbing lubes, since pain is a signal you want to hear
- Scented washes or douches, which can irritate thin tissue
Silicone lube lasts longer and many people love it for dryness. Just keep it away from silicone toys, as it can damage their surface.
Easing Back Into Sex
The Mayo Clinic's guide to sex after pregnancy says there is no set waiting period, but the usual advice is to wait until after your postpartum check. It also notes that it is common for people who never needed lube before to need it for a while after a baby.
When you feel ready, a few small changes make a big difference:
- Take longer to warm up. Low estrogen means arousal and wetness take more time.
- Start outside the body. Kissing, hands, oral sex or a vibe on the clit can feel great with zero friction inside.
- Let the receiving partner lead. Being on top lets you control depth and speed.
- Stop if it hurts. Pain tends to make the pelvic floor clench, which makes the next time harder.
- Talk about it. A quick "slower" or "more lube" keeps things fun for both of you.
Leaky breasts during sex are normal too. Feeding or pumping first, or keeping a bra on, can help if it bothers you.
When to See a Doctor or Pelvic Floor Physio
Dryness is common, but pain is not something you have to live with. Book in with your midwife, doctor or OB if you notice any of these:
- Pain that does not ease with lube and moisturizer after a few weeks
- Bleeding after sex, or a sore spot where you had stitches
- Unusual discharge, a strong smell, fever or burning when you pee
- A heavy or dragging feeling in the vagina
- Low mood, anxiety or no interest in anything, not just sex
Your provider may suggest options like low-dose vaginal estrogen and can weigh them with you while you are nursing. A pelvic floor physiotherapist can also help with scar tissue, tight muscles and painful sex after birth.
If dryness shows up for other reasons later in life, such as cancer treatment, our guide to vaginal dryness on tamoxifen covers hormone-free options in more depth.
Key Takeaways
- Breastfeeding lowers estrogen, and that is the main reason sex can feel dry or painful.
- Use a vaginal moisturizer on a schedule and a gentle lube during sex.
- Skip warming, scented and numbing products while tissue is thin.
- Go slow, start with outer play and let the receiving partner set the pace.
- See your provider or a pelvic floor physio if pain lasts or you notice bleeding.
This guide is general information, not medical advice. Check with your healthcare provider about your own situation.