Hi and welcome to HCM. There are few possible causes: it can be due to joint degenerative changes or limbosichialgia but also there can be vascular supply insufficiency so along with MRI
, doppler ultrasounds should be done. ESr
can be sign of any inflammation process. If this is sign of arhritis then you should take certain antiinflammatory medicine because injections are commonly not helpful.
Lower abdominal pain
is also nonspecific symptom. It can be resukting form gyn disorders but also many other. Firt step should be pelvic ultrasound and the paln further tests.Wish you good health.