Hello,
Welcome to Healthcaremagic.
From your query i under stood that, You may be suffering from ovarian cyst.
But there are plenty of causes for
low back pain radiating to pelvic area.
If it is associated with
menstruation , then it may be due to
endometriosis, adenomyosis or other Gynaecological diseases.
Women develop follicular cysts on their ovaries every month.
This is a normal process of womanhood.
At the start of your period your ovaries begin to grow follicles or cysts which contain eggs.
At ovulation the One mature and big follicle breaks open and releases the egg.
This cyst shell then regresses back into the ovary along with the other immature follicles and the same process will begin again.
So this normal cyst may be overlooked.
Other causes are Recurrent constipation,
Diverticulitis,
Urinary tract infection etc.
Get surgeon and physician opinion
Do CT or MRI abdomen if necessary.
Hope this helps.
Any doubt, kindly reply.
Take care.
Regards,
Dr.Manjeth