Hi, thanks for posting your concern in the HCM.
My understanding is that, without identifying the underlying cause, taking only pain medications, and that is even opioids, can never be a good choice. If at all, your pain cannot be managed with simple analgesia, you should be hospitalized and given symptomatic treatment until the underlying cause is known.
However, pain in the lower left back and left stomach can be sue to numerous reasons, including pancreatic pathology, an
abscess or a lump, splenic pathology (less common),
enteritis or
colitis, renal or ureteric cause.
You haven't mentioned where your doctor actually found the pus cell. I guess it was your routine examination of urine. If that is so, you have got a
pyelonephritis or a UTI.
Whatever the location is, pus cells do suggest infective or inflammatory pathology.
Hope you are satisfied with my answer. If you have any further query related to this, please write back.
In case you have any new query in future, you can directly ask me questions @ http://www.HealthcareMagic.com/doctors/dr-kaushik-sarkar/68460. I will try my level best to help you.
Regards,
Dr. Kaushik