Postpartum Cramping (Afterpains): Normal or a Warning?
Postpartum cramping, also called afterpains, is normal. It’s your uterus contracting as it shrinks back to its pre-pregnancy size, and it’s usually strongest in the first few days. ACOG says afterpains “may feel like menstrual cramps or even labor contractions,” that they’re more common “in women who have given birth before,” and that they’re more common “during the first few days of breastfeeding.” The cramps usually ease within days. When to worry: cramping that builds instead of easing, belly pain that is severe and doesn’t let up, or cramping with a fever or foul-smelling discharge. Those need a call to your OB.
What afterpains feel like, and why they happen
Nobody warned me that labor has a small encore. In the first days after birth, you can feel a wave tighten across your lower belly, peak, and fade, a lot like a period cramp. For some people it’s more like a mini contraction.
There’s a reason for it. Your uterus has to shrink a long way, fast. March of Dimes says that right after birth your uterus “is round and hard and weighs about 2½ pounds,” and that “by about 6 weeks after birth, it weighs only 2 ounces.” The cramps are the muscle doing that work.
They’re useful, too. HealthLinkBC, British Columbia’s public health service, says afterpains “help reduce uterine bleeding” as well as shrinking the uterus. So the cramp and the slowing of your bleeding are part of the same process. If you want the bleeding side of week one explained, postpartum bleeding covers lochia stage by stage.
Why cramping is worse when you breastfeed
This one surprises people. You sit down to feed, the baby latches, and a minute later your belly cramps. HealthLinkBC explains it: “Breastfeeding triggers the release of oxytocin, which causes the uterus to contract.” Oxytocin is the same hormone behind your let-down. One feed sets off both.
Practically, that means:
- The cramps cluster around feeds in the first days.
- You may notice a little more bleeding during or after a feed at the same time.
- It’s a sign the feeding hormones are working, not a sign something’s wrong.
The early days of feeding are hard enough without a surprise cramp. Breastfeeding in the first week covers the rest of what’s going on.
Why afterpains can be stronger with a second baby
ACOG says afterpains “are more common in women who have given birth before.” So if this is your second or third baby and the cramps feel stronger than you remember, that matches what ACOG describes. If it’s your first baby and they’re mild or you barely notice them, that’s normal too.
How long postpartum cramping lasts
Not long, usually. HealthLinkBC says the pains “usually start to go away by the third day after childbirth.” March of Dimes says “the cramps should go away in a few days.”
The pattern to watch for is that it eases. The cramps get further apart, milder, and more closely tied to feeds, and then they fade. Pain that’s getting worse as the days go on is not part of that pattern. Neither is pain that’s constant rather than coming in waves. Both are worth a call.
What helps
Heat. ACOG says “applying a heating pad to your abdomen will help relieve this discomfort.” A heating pad with an automatic shut-off, like the Sunbeam XL heating pad, is a good pick for the exhausted days, when dozing off is likely.
Ask about pain relief before you need it. ACOG’s postpartum pain page covers which pain relievers are considered safe while breastfeeding. Ask your OB or nurse which one is right for you, and how much, before you leave the hospital. That way you’re not guessing at 3am. HealthLinkBC adds that if afterpains are severe, “your doctor or midwife can prescribe medicine that is safe and works well.”
When postpartum cramping is a warning sign
Infection of the uterine lining after birth (endometritis) is the main thing to rule out. Cleveland Clinic lists its symptoms as fever, “pelvic pain or lower abdominal pain,” and “foul-smelling or irregular vaginal discharge.” It notes that a C-section is one of the things that raise the risk. Those signs can look like ordinary afterpains at first. The difference is the company they keep and the direction they’re heading.
The CDC’s urgent maternal warning signs include a fever of 100.4°F or higher, “severe belly pain that doesn’t go away,” and “vaginal bleeding or discharge after pregnancy.” It says to seek medical care immediately for any of them.
| What you’re feeling | What to do |
|---|---|
| Period-like cramps in waves, strongest during feeds, easing over days | Normal afterpains. Heat, rest, pain relief your OB has okayed |
| Cramps that feel stronger than with your first baby | Expected; ACOG says afterpains are more common after previous births |
| Cramping that’s getting worse instead of easing | Call your OB |
| Constant belly pain that doesn’t come and go | Call your OB |
| Cramping with a fever of 100.4°F (38°C) or higher | Call now |
| Cramping with foul-smelling discharge | Call now |
| Severe belly pain that doesn’t go away | Seek care immediately (CDC) |
| Soaking a pad in an hour, or large clots, with cramping | Seek care now |
Cramping and swelling often show up in the same week. Postpartum swelling has its own list of what’s normal and what isn’t. For the whole six-week arc, see postpartum recovery week by week.
FAQ: postpartum cramping
Is cramping normal after giving birth?
Yes. Afterpains are the uterus contracting as it shrinks back. ACOG says they can feel like period cramps or even labor contractions.
Why do I get cramps when I breastfeed?
Breastfeeding releases oxytocin, which makes the uterus contract. HealthLinkBC says that’s why you’re most likely to notice afterpains while feeding.
How long do afterpains last?
Usually a few days. HealthLinkBC says they usually start to go away by the third day after birth, and March of Dimes says they should go away in a few days.
Are afterpains worse with a second baby?
They can be. ACOG says afterpains are more common in women who have given birth before.
When should I worry about postpartum cramping?
When it’s getting worse instead of better, is constant or severe, or comes with a fever or foul-smelling discharge. Those can be signs of infection and need a call to your OB.
