Symphysis Pubis separation, or widening, of the pubic bones causes pain. It is caused by instability of the pelvis, illiopsoas, and pelvic floor muscles. Wear a pregnancy belt and begin simple exercises to address the instability for quick relief.
This is a result of long time instability getting more instable about mid way through pregnancy.
Activity: Squeeze a ball between your knees 20 times while sitting fair and square in a chair. Inhale and let your knees loosen around the ball without dropping it. Exhale and squeeze the ball. Make sure your knees are right above your ankles so you are sitting upright and well balanced.
Then repeat with the ball between your thighs in the same manner. Do these daily.
Calf stretches, walking, and general body balance. Do not over work the "core" or ab muscles.
Later as your pelvis is more stable, get down on the floor and do half bridge with a ball in these two spots, one set before the other. That's bending your knees and putting your ankles below your knees again. LIft your pubic bone with the exhale while you squeeze the ball. You won't be able to do this comfortably until pelvic stabilization is MUCH improved! Don't hurry. Do the above exercises for a few weeks first!
Epidurals or extreme flexibilty (limber yoginis) can allow the nurses or leg-holding family members to open a birthing woman's legs too far during the birth of a baby's head. This can separate the pubic joint. Ask them to be mindful of your range of motion.
This can be healed but more than time is necessary. Good posture and stabilizing the pelvis while lengthening the psoas and balancing the pelvic floor are the holistic way to deal with this challenge. Feedback is appreciated.
Find more from your physiotherapist, physicial therapist, advanced body worker, chiropractor, or osteopath.