No one warns you that the cramps don't end when labor does. In the hours and days after birth, many people feel a squeezing, period-like ache low in the belly, often strongest the moment they sit down to feed their baby. On top of everything else you're adjusting to, it can be an unwelcome surprise.

Those cramps have a name: afterpains, and they're doing important work. Learn what causes postpartum cramping after birth, how long afterpains usually last, what can ease them, and when a cramp is worth a call to your provider.

Afterpains are your uterus shrinking back toward its pre-pregnancy size, a process called involution. Here's what's happening under the surface.

Over 9 months, your uterus grew dramatically to hold your baby. After birth, it contracts to shrink back down, and those same contractions squeeze blood vessels closed to limit bleeding. That double duty is why the cramps can feel like strong period pains.

First-time parents sometimes barely notice afterpains, while people who have given birth before often feel them more. A uterus that has stretched through previous pregnancies tends to contract harder to firm back up, which is also more common with later births.

The sharp part is usually short-lived, even if milder aches hang around a bit.

For most people, afterpains are strongest in the first 24 to 48 hours and start easing within a few days. Some feel mild cramping for up to about 7 to 10 days, and the full involution process- your uterus returning to size- takes roughly 6 weeks. If it isn't your first birth or you're breastfeeding, expect the early days to feel more intense.

Afterpains fade on their own, but you don't have to just grit your teeth. A few things genuinely help.

A heating pad on your lower belly is a simple, effective comfort, and ACOG (American College of Obstetricians and Gynecologists) notes ibuprofen often works better than acetaminophen for afterpains (check with your provider on what's right for you, especially while nursing). Resting when you can and emptying your bladder regularly can ease the ache too.

The slow breathing you may have leaned on in labor works here as well, and light movement, like short, easy walks, can help everything settle. Nothing strenuous: this is about comfort, not fitness.

Birth comes with blood loss, which draws down your Iron, and rebuilding those stores supports your energy as you recover. A postpartum formula like the Postpartum Pack includes Iron plus Choline, Selenium, and DHA for the fourth trimester. Magnesium plays a role in muscle function, which is one reason the Calcium + Magnesium + Vitamin D Boost is a common postpartum add-on; the pair come together in the Postpartum Recovery Bundle. Warm, mineral-rich foods help too, and our bone broth recipe is an easy place to start.

Afterpains should be manageable and fade with time. Some symptoms, though, point to something that needs attention. Call your doctor or midwife if you notice:

• Cramping that gets worse instead of better after the first week.
• A fever or foul-smelling vaginal discharge, which can be signs of infection.
• Heavy bleeding, like soaking through more than 1 large pad an hour, or passing clots bigger than a golf ball.

Trust your gut here. If the pain feels beyond ordinary cramping, get it checked. It's also worth knowing what typical bleeding looks like as you heal, which our guide to your first postpartum period covers.

Afterpains can be an uncomfortable surprise, but they're a sign your body is healing exactly as it should: shrinking down the space your baby grew in and protecting you from heavier bleeding. For most people, the worst is over within a few days.

Give yourself heat, rest, and grace while your uterus finishes its work. If you're piecing together what your body needs this trimester, our postpartum quiz can help you find a supplement match for where you are now, and our rundown of the 6 nutrients a postpartum vitamin should cover explains what to look for.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.