For most women, menstrual cramps usually start 1 to 2 days before
they start their periods and go away as their bleeding diminishes.
Cramping that starts 5 to 7 days before menstruation begins is not
typical for most women and may be caused by a problem such as
endometriosis or an
ovarian cyst.
It is unusual for cramping to continue after your period has ended.
This may be a symptom of a
pelvic infection.
If you have pelvic cramps that begin before your period starts or
that continue after your period is over, call your doctor for an
evaluation.