Thank you for the query.
Lower abdominal pain
and back pain is usually caused by urinary tract
stones, urinary track infection. Ovarian cyst
or uterine problem should be also considered.
With urine problem, frequent urinating and burning while urinating can be also present. Fever can appear.
Sometimes lower abdominal pain on the left side is caused by diverticulitis
, however this condition is possible only if constipation has been present before.
Right lower abdominal pain and vomiting should be always checked with appendicitis
I suggest your wife to visit your doctor and have blood work, CRP, urine analysis and abdominal ultrasound performed.
Hot bath can give some relief in a meanwhile.
Hope this will help.