Can Sciatica Happen During Pregnancy?

Yes, sciatica is common during pregnancy, driven by two pregnancy-specific factors: the hormone relaxin loosening pelvic ligaments to prepare for childbirth, which can destabilize the SI joints and irritate the sciatic nerve, and the mechanical changes of a growing uterus shifting your center of gravity forward and tightening the piriformis muscle as it compensates for pelvic instability.

If sciatic pain has shown up for the first time during pregnancy, or an old, mild issue has become noticeably worse, that's a genuinely common experience with real, specific physiological reasons behind it, not just an inevitable part of pregnancy you have to wait out.

Two Pregnancy-Specific Reasons Sciatica Develops

Relaxin, a hormone that rises significantly during pregnancy, loosens the ligaments throughout your pelvis to allow the necessary flexibility for childbirth. This same increased laxity affects the SI joints allowing more movement there than these joints are built to have outside of pregnancy. That extra movement can directly irritate the sciatic nerve as it passes near the SI joint and pelvis.

The second factor is mechanical. As your uterus grows, your center of gravity shifts forward, increasing the curve in your lower back in a more pronounced version of the pattern covered in our piece on sitting-related pain. This shift also frequently causes the piriformis muscle to tighten as it works to stabilize an increasingly unstable pelvis, feeding directly into the same double crush mechanism covered in our piece on foot numbness, where nerve root irritation and piriformis compression compound each other. In later pregnancy, the position and growth of the uterus itself can also place direct pressure on or near the sciatic nerve pathway, adding a third contributing factor specific to advancing gestation.

When It's Something More Serious

Get immediate medical attention for loss of bladder or bowel control, saddle numbness, or progressive leg weakness, since these require urgent evaluation regardless of pregnancy status. Any sudden or severe pain during pregnancy, especially alongside reduced fetal movement or other concerning symptoms, should prompt immediate contact with your OB provider or midwife. Sciatica during pregnancy should always be managed in coordination with your prenatal care team alongside any other treatment.

How This Gets Addressed

Because pregnancy-related sciatica involves hormonal and mechanical factors specific to this stage, treatment is adapted specifically for pregnancy rather than applying standard sciatica protocols directly.

The Webster Technique, a chiropractic approach specifically developed to assess and improve pelvic balance and reduce tension on the ligaments supporting the uterus during pregnancy, is often the most directly relevant starting point for pregnancy-related sciatica.

Dry needling, adapted with pregnancy-safe positioning and technique, address piriformis and pelvic muscle tension contributing to nerve compression.

Physical therapy provides pregnancy-safe stabilization exercises to support an increasingly lax pelvis through the changes relaxin is producing.

And naturopathic medicine can support overall pregnancy wellness through appropriate, pregnancy-safe guidance, always in coordination with your OB or midwife for anything involving supplementation.

You can learn more about our full approach to sciatica here.

Most pregnant patients notice meaningful relief with a plan specifically adapted to the hormonal and mechanical changes of pregnancy, rather than trying to manage symptoms alone or waiting for delivery.

Written By:

Dr. Jason Winkelmann

Naturopathic doctor, Chiropractor, Chronic Pain Specialist, and Educator

Frequently Asked Questions

Is it safe to get chiropractic care or massage for sciatica while pregnant? 

Chiropractic care and massage, when provided by practitioners experienced in pregnancy-specific techniques and positioning, are generally considered safe throughout pregnancy and are commonly used to manage pregnancy-related sciatica. Always discuss any treatment plan with your OB provider as part of your overall prenatal care.

When during pregnancy does sciatica typically start? 

It can develop at any point, but symptoms often become more noticeable in the second and third trimesters as relaxin levels rise further and the growing uterus increasingly shifts your center of gravity and posture.

Will sciatica during pregnancy go away after giving birth? 

For many patients, symptoms improve significantly after delivery as relaxin levels decrease and pelvic mechanics gradually return toward their pre-pregnancy state. Continued postpartum care can help support that recovery, particularly if any pelvic instability or piriformis tension persists.