Thanks for your query. Three possibilities are coming to my mind from your symptoms. I will try explaining the three one by one.
1) The first possibility is of kidney or renal stones
in the left kidney. Kidneys are in close approximation with the abdomen and any stone in the kidney can cause pain in the abdomen which can radiate to the back. Changes in body position do not relieve this pain. This is a cramping sort of pain and may be accompanied by nausea and vomitings.
2) The second possibility is of pleuritis which is inflammation of the pleura, a lining covering the lungs. This pleuritis may be due to pneumonia
and causes chest pain
(usually sharp) when you take a breath or cough.
3) The third possibility is of any muscular pain
related to the musculoskeelatal system and radiating to the back as well.
Now to rule out these possibilities you need to consult a physician and get certain investigations done. these include a complete urine examination, x-ray KUB( kidney urinary bladder
) or ultrasound
abdomen and a x-ray or CT chest. Till that time, apply warm compresses and take some anti inflammatory pain killer after consulting your doctor.
Hope this information helps you. If you have additional questions regarding these recommendations, you should not hesitate to contact Doctor
at HealthcareMagic, who is in contact with me. Wishing you good health.