What to Do About Lower Back and Back Pain in the Third Trimester

During the third trimester of pregnancy, lower back and lumbar discomfort is common. This can be alleviated by adjusting daily postures, replacing supportive cushions, engaging in gentle, moderate physical activity, applying localized heat therapy for muscle relaxation, and controlling weight gain. As the fetus grows larger, it exerts increasing traction on the lumbar and back muscles, progressively overloading the lumbar spine and causing soreness and discomfort. If severe lower back or lumbar pain occurs—especially when accompanied by uterine contractions or vaginal bleeding—prompt medical evaluation and treatment at a hospital are strongly recommended.

1. Adjust Daily Posture: Maintain an upright posture with a straight lower back while standing; avoid prolonged unilateral weight-bearing. When sitting, avoid slouching; rise slowly and deliberately, avoiding sudden twisting motions of the waist to minimize pressure on the lumbar spine and back muscles.

2. Use Supportive Cushions: Place a soft cushion at the lumbar region of your chair to support the spine. During sleep, adopt a side-lying position and place a soft pillow between your knees. This helps reduce pelvic strain, redistribute abdominal weight, and relieve persistent tension in the lower back and lumbar area.

3. Engage in Gentle, Moderate Activity: Opt for low-impact exercises such as leisurely walking or prenatal yoga. Keep exercise duration moderate. Gently stretch the lumbar, back, and pelvic floor muscles to enhance local blood circulation and prevent muscle stiffness caused by prolonged sitting or lying down.

4. Apply Localized Heat Therapy: Use a warm (not hot) towel applied to the sore area for an appropriate duration. The soothing warmth helps relax tense muscles, improves local blood circulation, and reduces the aching, swollen sensation associated with muscle spasms.

5. Manage Weight Gain: Maintain a balanced daily diet and monitor the rate of weight gain. Rapid weight gain increases forward abdominal pull, placing sustained additional stress on the lumbar spine and progressively worsening lower back and lumbar discomfort.

When getting up or turning over in bed, move slowly and deliberately. Minimize bending at the waist to pick up objects. Pay close attention to bodily sensations, and thoughtfully balance rest and activity to reduce continuous mechanical stress on the lower back and lumbar region.