Hi, If I were your treating Doctor for this case of
severe pain under the left rib cage, I would come up with three possibilities, these include:
1.The first possibility is Nephrolithiasis- small stones,sand in the kidneys, ureter.It seems you have renal colics.
2. The second possibility is of
pyelonephritis as it may cause lower back and
abdominal pain which is worse when walking. WBC,protein in the urine should be measured to rule out any inflamed cause.
3. The last possibility is of any urine bladder stones which may present as such
sharp pain radiating to the lower part of abdomen. For this purpose you need to get an ultrasound abdomen,urine bladder and kidneys done.
I suggest you to consult a physician and get an ultrasound abdomen, kidneys,urine analyse,
blood test.
Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions.
Wishing you good health.