<prompt> If you are a doctor, please answer the medical questions based on the patients description.i was admitted to hospital yesterday wit severe lower bak pain my gp tought kidneystones had blood urine n scan tests notin showed was released n told take pain killers tat maby it passed but still v sore only confort i get is lyin down n i tink mt side swolen now  <response>: Cellophane You for contacting Chat Doctor. There are multiple causes of lower back pain. I would have been in a better position to guide if u had told your age. I would suggest following differential according to priority: Muscular spasm Renal Calculi Pelvic Inflammatory Disease PyelonephritisThey can be ruled out on the basis of clinical and lab evaluation. Hope this answers your question. If you have additional questions or follow-up questions then please do not hesitate in writing to us. Wishing you good health. 