<s>[INST] Hi. 19 year old female. Extreme pain lower left back and left pelvic area. Went to er last night. Thought it was kidney issues blood ok. Urine ok CT scan, no issues.  Have had ovarian cysts and kidney infections in past.  Im her grandma.   She was released from er. Couldnt find anything. Has had depo. (? Birth control shot) [/INST] If after thorough check up in ER nothing has been found contributory to any obvious pathology, it is worth wait and watch giving her complete bed rest on firm mattress, hot packs and some pain relievers (must have been ordered in ER).your daughter is pretty young to get primary back pain so spinal disease is unlikely.it may be some hormonal imbalance possible with history of ovarian cysts and sometimes it may be due to UTI itself (ureteric inflammatory pain-tubes that Chat Doctor.  </s>