thank you for your query.
Lower back pain
and abdominal pain
before periods is called Dysmenorrhea.Menstrual pain
is due menstrual uterine contractions, which are generally of higher strength, duration and frequency than in the rest of the menstrual cycle.
Dysmenorrhea can feature different kinds of pain, including sharp, throbbing, dull, nauseating, burning, or shooting pain.
Dysmenorrhea may precede menstruation
by several days or may accompany it, and it usually subsides as menstruation tapers off.
It is often associated with changes in hormonal
levels in the body that occur with ovulation.
It is not a serious condition but requires attention.
A specific medical history of symptoms and menstrual cycles and a pelvic exam should be done.
Initially for the pain,NSAID's or COX-2 inhibitors can be used.
wishing you good health.