Afterpains: why uterine cramping gets worse with subsequent babies and breastfeeding

Postnatal recovery · Updated July 2026 · All articles

Many first-time mothers are surprised to feel what seem like contractions continuing after birth. These postnatal cramps, known as afterpains, are not a sign that something has gone wrong. They are the uterus doing exactly what it is supposed to do: contracting back down to its pre-pregnancy size. If this is your second or subsequent baby, you may have been warned that afterpains are significantly stronger the second time around, and that warning is usually accurate.

What are afterpains and why do they happen?

Afterpains are contractions of the uterine muscle that occur in the hours and days following birth. The uterus, which grew from roughly the size of a pear to accommodate your baby, placenta, and amniotic fluid, needs to return to its original size through a process called involution. This is achieved by the uterine muscle contracting and compressing the blood vessels in the uterine wall, which also helps to limit blood loss after delivery.

The contractions are driven by oxytocin, the same hormone that powered labour contractions. In the immediate postnatal period, oxytocin is released naturally as part of the body's recovery process. It is also released in response to breastfeeding, which is why feeding your baby often triggers or intensifies afterpains, particularly in the first few days.

For first-time mothers, afterpains can often be managed reasonably well because the uterine muscle is contracting effectively without needing to work as hard. For people having their second, third, or subsequent baby, the experience can be considerably more intense.

Why afterpains get worse with each baby

The reason afterpains are stronger in subsequent births comes down to the tone of the uterine muscle. In a first pregnancy, the uterus is contracting for the first time. The muscle tone is good and the uterus tends to remain reasonably contracted between episodes of cramping, limiting the severity of each wave.

After each subsequent pregnancy, the uterine muscle has been stretched further than before and has lost some of its resting tone. When it needs to contract after the birth, it must work harder to achieve the same result. The cramping therefore tends to come in stronger waves and may feel much more like active labour contractions, particularly during the first 48 hours. This is a normal physiological pattern, not a complication.

Many people having a second or subsequent baby are genuinely caught off guard by how painful afterpains can be. It is worth knowing this ahead of time and planning adequate pain relief rather than trying to manage without.

Why breastfeeding makes afterpains worse

When your baby latches on to breastfeed, sensory signals from the nipple travel to the hypothalamus in the brain, triggering a release of oxytocin. This oxytocin causes two things to happen: the milk ejection reflex (let-down) and uterine contractions. This is why many breastfeeding mothers notice that cramping surges during or immediately after a feed, particularly in the first three to five days when afterpains are at their most intense.

This is actually a beneficial process. The uterine contractions stimulated by breastfeeding help the uterus to return to its normal size more quickly and reduce the risk of excessive blood loss. This is one of the physiological reasons why breastfeeding is associated with faster postnatal recovery of the uterus. But it does mean that the time when you are sitting quietly feeding your baby can involve some quite significant discomfort in the early days.

Planning ahead for feeds by taking pain relief 30 minutes before a feed, emptying your bladder beforehand, and having a heat pack ready can all help you manage the cramping more comfortably.

Typical duration of afterpains

For most people, afterpains are most intense in the first 24 to 48 hours after birth and gradually reduce in severity over the following days. By around day three to five, the discomfort is usually much more manageable, and by the end of the first week it has resolved for most people.

In people having second or subsequent babies, afterpains may be more intense throughout and may persist for a day or two longer. However, even in these cases, significant afterpains rarely continue beyond the first week.

If you have had a caesarean section, you will also experience afterpains as the uterus contracts, in addition to the post-surgical wound pain. This can be a lot to manage simultaneously, which is another reason why good pain relief planning in the first days after a caesarean is important.

Pain management: what actually helps

The most effective approach to afterpain management is regular, timed pain relief rather than waiting until the pain is severe and then trying to catch up. Paracetamol and ibuprofen are both effective, can be taken together, and are safe during breastfeeding. Taking them around 30 minutes before a feed, particularly in the first days, can make the experience significantly more comfortable.

A warm heat pack placed on the lower abdomen provides additional relief. This is one of those simple measures that many people underestimate: gentle warmth helps muscles relax and can take the edge off cramping very effectively. A warm bath or shower has a similar effect.

Emptying your bladder before sitting down to feed your baby reduces pressure on the uterus and can make the cramping less intense. Finding a comfortable position for feeding, whether that is lying down, using a feeding pillow, or sitting in a particular way, is also worth experimenting with if certain positions seem to make the cramping worse.

Uterine involution: how quickly it happens

The uterus is remarkably efficient at returning to size. Immediately after delivery, it can be felt as a firm mass at roughly the level of the navel. Over the following days and weeks, it descends back into the pelvis. By about ten days after birth, it can no longer be felt abdominally, and by six to eight weeks it has returned to close to its pre-pregnancy size and position.

Your midwife will check the position and firmness of the uterus at postnatal visits in the first ten days, which is one of the ways they assess that involution is progressing normally. Breastfeeding and effective afterpains, despite being uncomfortable, are signs that this process is working well.

When cramping after birth is not normal

Afterpains should be improving, not worsening, after the first couple of days. If cramping is getting significantly more severe after the initial 48 hours, or if the cramping is accompanied by a fever above 38 degrees C, foul-smelling vaginal discharge, an unusually tender abdomen, or heavy bleeding, these are signs that something other than normal involution may be happening. The most likely causes include a uterine infection (endometritis) or retained placental tissue, both of which need medical assessment and treatment. Contact your midwife, GP, or maternity triage depending on how unwell you feel.

Frequently asked questions

What are afterpains?

Afterpains are the contractions of the uterus as it works to return to its pre-pregnancy size after birth. They can feel like strong period cramps or mild labour contractions, particularly in the first few days.

Why do afterpains get worse with each baby?

With each pregnancy, the uterine muscle fibres stretch further than they did before. After the birth, the uterus needs to work harder to contract back to size, and the muscle contraction response is stronger in a uterus that has been through multiple pregnancies.

Why do afterpains get stronger during breastfeeding?

Breastfeeding triggers the release of oxytocin, which causes the uterus to contract. This is why many mothers notice a surge in cramping during or just after a feed, particularly in the first few days.

How long do afterpains last?

For most people, afterpains are most intense in the first 24 to 48 hours after birth and usually resolve within 3 to 5 days. In second or subsequent births, they may last a little longer and be more intense throughout.

What is the best way to manage afterpains?

Paracetamol and ibuprofen taken regularly rather than waiting until pain is severe are effective. A warm heat pack on the lower abdomen helps. Emptying your bladder before feeds reduces discomfort. Some people find certain positions for feeding more comfortable.

When is cramping after birth not normal?

Cramping that is worsening rather than improving after the first few days, or that is accompanied by fever, foul-smelling discharge, or heavy bleeding, should be assessed. These may indicate an infection or retained placenta.

This article is for general information only. Always speak to your midwife, GP, or health visitor if you have concerns about your physical recovery after birth.