Hello!
I understand your concern.
In my opinion the changes in the curvature of your spine may be caused by muscular spasms of the muscles in this region.
The muscular spasms may be caused by a
lumbar spine lesion , infectious, inflammatory etc. Even straining physical activity can cause muscular spasms usually because of a disc displacement.
I would recommend you a full blood work to rule out infection and inflammation and a xray of the lumbar spine. I assure that it has no effect on
breastfeeding. If the problem persists a lumbar CT scan would be necessary to examine better the lumbar spine.
I would also recommend avoiding of straining physical activity, cold packs on your back and
massage in this region to have pain relief and release muscular contractions.
Acetaminophen or
ibuprofen would cause pain relief and are safe in breastfeeding.
Hope to have been helpful!
Best wishes Dr. Abaz Quka