Due to hormonal changes during pregnancy, abdominal and pelvic muscles are stretched, and lower back muscles may shorten. This can cause muscle imbalances–which can lead to pain.
Pelvic joint laxity may also occur, increasing forces on the lower back and hip joints, making it difficult to perform everyday tasks.
Those with multiple pregnancies, a history of low back pain, and a high workload may have increased risk of pain. Pregnancy back pain may be on one or both sides, experienced with sitting, standing, walking, bending, lifting, and sleeping. Physical therapy to treat lower back pain during pregnancy may include: