<s>[INST] Hi I'm a 30 year old woman who is suffering from lower dull back pain that resembles pain suggestive of a UTI. The thing is I've been tested and everything came back negative. What esle would cause that. Another symptom associated with it is a very strong ammonia discharge. [/INST] Dear patient  At you age this symptoms  might be due to pelvic inflammatory disease  or its muscular pain. Pelvic inflammatory disease is a condition in which there is inflammation  of  pelvic genital organs which leads lower back pain and mild lower abdominal pain with symptoms  of uti. You need to be investigated with 1. Ultrasound  of abdomen 2. Xray of lumbosacral spine anteroposterior and lateral views  to confirm diagnosis.  Need to consult expert gynecologist with report. </s>