The intensity varies from person to person.This could be due to nerve compression, fatigue,
pelvic inflammatory diseases, low salt--as
in sodium and potsaaium etc.
"Pregnancy and childbirth have a nasty tendency to cause a number of nagging minor health problems (back pain, hemorrhoids, constipation, varicose veins, to name a few) or to reveal dormant ones. Close to half of new mothers have at least one health concern in the weeks following childbirth.