Postpartum

Postpartum Back Pain: Why It Happens

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Postpartum back pain usually reflects several ordinary causes together — lingering hormone-driven joint laxity, a stretched-out core and pelvic floor, and long hours of feeding and carrying in awkward positions. The epidural is not a proven cause, and for most people it eases over the first several months as strength returns.

Last updated: July 2026

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Why does your back hurt after having a baby?

Postpartum back pain is common and usually adds up from several ordinary strains rather than one injury. Pregnancy hormones loosen the ligaments of the spine and pelvis, the growing uterus stretches and weakens the abdominal core, and posture shifts for months — then a newborn arrives who must be lifted, fed, and carried dozens of times a day. Sleep is short, which lowers pain tolerance, and hunching over feeds strains the upper back and neck. These overlap, which is why the ache can feel diffuse and hard to pin to one spot. The reassuring pattern is that most postpartum back pain settles over the first several months — often within 6 to 12 months — as strength returns 1, not something that keeps escalating.

How do hormones and a stretched core play in?

The hormone relaxin, elevated in pregnancy, increases the flexibility of pelvic and spinal joints and does not fully reverse the moment the baby arrives — laxity can linger for up to around 5 months, and longer while breastfeeding 1. A looser, less stable pelvis leans more on muscles for support, which fatigues them. At the same time the abdominal wall has stretched, sometimes leaving diastasis recti, so the deep core that normally braces the spine is weaker. The pelvic floor, part of that same supporting canister, is recovering too. Rebuilding core and pelvic-floor strength gradually is one of the more effective things for the pain 1, which is why a targeted plan tends to beat rest alone.

Did the epidural cause the back pain?

Many people blame a lingering ache on the epidural, but the evidence does not support it as a cause of long-term back pain. Large reviews comparing people who had an epidural with those who did not find no meaningful difference in ongoing back pain afterward 4. Brief tenderness at the injection site can happen for a few days, but it is local and temporary. The more likely drivers are the same ones behind most new-parent back pain: hormone-driven joint laxity, a weakened core, poor sleep, and the mechanics of feeding and carrying. Letting go of the epidural theory helps, because it points toward the changes that actually respond to strengthening and posture work.

What eases postpartum back pain day to day?

Everyday mechanics are where most of the relief lives. Bringing the baby up to feed rather than folding down, using pillows for support, and alternating carrying sides cut the strain of holding. Lifting from the hips and knees and keeping loads close protect the back. Gentle movement beats bed rest: back pain exercises, a daily walk of 20 to 30 minutes, and a graded return toward about 150 minutes of activity a week rebuild support 1. According to ACOG, activity can resume gradually once you are cleared, often around 6 weeks. Pelvic floor physical therapy addresses the core-and-floor weakness underneath 3, and lower back pain relief measures like heat bridge the harder days.

When postpartum back pain needs a clinician

Most postpartum back pain is mechanical and improves, but some patterns warrant a check. Postnatal guidelines suggest evaluation for pain that is severe, is not improving after about 2 months, or is worsening 2, as well as pain with fever, that follows a fall, or that comes with leg pain, numbness, or weakness. Certain symptoms are urgent rather than routine and are covered in the safety box below. Lifecycle matters too: back and joint aches can flare again later during the perimenopausal transition as estrogen falls, so building strong core and posture habits now pays off for years. A clinician or physical therapist can sort mechanical strain from anything needing imaging or specific treatment. Gale can help you prepare for that conversation.

Common questions

For most people it eases over the first several months as hormone-driven joint laxity resolves, the core rebuilds, and sleep improves. Timelines vary. Pain that is severe, not improving after a couple of months, or getting worse is a reason to be evaluated rather than to keep waiting it out.

Almost certainly not. Large reviews find no meaningful link between having an epidural and long-term back pain. Brief soreness at the injection site can occur for a few days, but lasting pain is far more likely to come from joint laxity, a weakened core, poor sleep, and feeding-and-carrying posture.

Usually yes, and gentle movement tends to help more than rest once you are cleared after birth. Graded walking, core and pelvic-floor rebuilding, and posture work rebuild the support the back lost. If a specific movement sharply worsens the pain, a physical therapist can adjust the plan.

It can, in two ways. Hunching over feeds strains the upper back and neck, which good positioning and pillows address. Breastfeeding also keeps estrogen lower, which can prolong the joint laxity of pregnancy for some, so the mechanical support returns a little more slowly.

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When postpartum back pain needs urgent review

  • —Back pain with new leg weakness, numbness in the groin or inner thighs, or loss of bladder or bowel control needs same-day or emergency care — call 911 or go to an emergency room.
  • —Back pain with a high fever, chills, or feeling very unwell is a reason to seek same-day clinical care.
  • —Severe pain after a fall or injury is a reason to seek prompt clinical evaluation.
  • —Back pain that is severe, steadily worsening, or not improving after a couple of months is a reason to arrange a clinical review.

Back pain with new leg weakness, numbness in the groin, or loss of bladder or bowel control can signal nerve compression and needs same-day or emergency care — call 911 or go to an emergency room right away.

This article is general health education, not medical advice. What is causing your back pain and what will help depends on your history and an exam, which are best assessed by a primary-care or obstetric clinician or a physical therapist.

References

  1. 1.American College of Obstetricians and Gynecologists (2020). Physical Activity and Exercise During Pregnancy and the Postpartum Period: ACOG Committee Opinion, Number 804. Obstetrics & Gynecology. doi:10.1097/AOG.0000000000003772 ✓ACOG guidance on physical activity in pregnancy and the postpartum period, including musculoskeletal changes, joint laxity, and the role of graded activity and core rebuilding in recovery
  2. 2.National Institute for Health and Care Excellence (2026). Postnatal care (NG194). National Institute for Health and Care Excellence (NICE). link ✓NICE postnatal-care guidance on assessing symptoms after birth and on when persisting or red-flag symptoms warrant clinical review
  3. 3.Woodley SJ, Lawrenson P, Boyle R, et al. (2020). Pelvic floor muscle training for preventing and treating urinary and faecal incontinence in antenatal and postnatal women. Cochrane Database of Systematic Reviews. doi:10.1002/14651858.CD007471.pub4 ✓Cochrane evidence supporting pelvic-floor muscle training as part of postpartum recovery of the core-and-floor support system
  4. 4.Anim-Somuah M, Smyth RMD, Cyna AM, Cuthbert A (2018). Epidural versus non-epidural or no analgesia for pain management in labour. Cochrane Database of Systematic Reviews. doi:10.1002/14651858.CD000331.pub4 ✓Cochrane review comparing epidural with non-epidural analgesia in labour, finding no meaningful association between epidural use and long-term back pain

4 sources, numbered by first appearance. General health information, not medical advice. AI-assisted editorial content — every citation independently verified. Editorial policy

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