Thank you for your query on Healthcare Magic.
Pain may be because of exaggeration of the deformity
or due to pressure on skeleton and musculature because of child weight.
You can take calcium supplements
for bone strength.
If the pain is significant, take ibuprofen
in prescribed dose with food.
Change the position frequently and don't sit for prolonged periods
in one posture.
Sit and lie down in accurate and straight posture.
If the pain persists consult the orthopedician for examination and further advise.
Hope I have answered your query.