14 doctors weighed in:
What causes sciatica during pregnancy?
14 doctors weighed in

Dr. Larry Armstrong
Neurosurgery
8 doctors agree
In brief: Pressure
There are a few causes of sciatica during pregnancy- among these are pressure on the lumbar plexus of nerves by the uterus/baby, increased pressure on the disks from increased weight in pregnancy, or simply increased stress on the piriformis muscle imitating sciatica.
There are a few more but these are some of the more common ones.

In brief: Pressure
There are a few causes of sciatica during pregnancy- among these are pressure on the lumbar plexus of nerves by the uterus/baby, increased pressure on the disks from increased weight in pregnancy, or simply increased stress on the piriformis muscle imitating sciatica.
There are a few more but these are some of the more common ones.
Dr. Larry Armstrong
Dr. Larry Armstrong
Thank
Dr. Qamar Khan
Pain Management
4 doctors agree
In brief: Lots of Reasons
When pregnant, there are so many things going on.
Your hormones are very different causing your ligaments to stretch quite a bit especially in the pelvis resulting in pain. Also the baby's position can place stress on your spine resulting in bulging discs or even herniated disks causing the sciatica pain. Recommend seeing a pregnancy specialized therapist that can guide you through this.

In brief: Lots of Reasons
When pregnant, there are so many things going on.
Your hormones are very different causing your ligaments to stretch quite a bit especially in the pelvis resulting in pain. Also the baby's position can place stress on your spine resulting in bulging discs or even herniated disks causing the sciatica pain. Recommend seeing a pregnancy specialized therapist that can guide you through this.
Dr. Qamar Khan
Dr. Qamar Khan
Thank
Dr. Thomas Namey
Internal Medicine - Rheumatology
1 doctor agrees
In brief: Most common-pyriform
The fetus can compress the pyriformis muscle and cause it to spasm. It is easier to occur when the pelvis widens, already stretching this muscle.
This muscle overlies the sciatic nerve (actually one third of people have sciatic nerve branches passing through it! when it cotracts-bingo, an abrupt onset of sciatica!

In brief: Most common-pyriform
The fetus can compress the pyriformis muscle and cause it to spasm. It is easier to occur when the pelvis widens, already stretching this muscle.
This muscle overlies the sciatic nerve (actually one third of people have sciatic nerve branches passing through it! when it cotracts-bingo, an abrupt onset of sciatica!
Dr. Thomas Namey
Dr. Thomas Namey
Thank
Get help from a real doctor now
Dr. Jane Van Dis
Board Certified, Obstetrics & Gynecology
14 years in practice
47M people helped
Continue
108,000 doctors available
Read more answers from doctors