If you have been having lower back pain which is radiating to one leg and the pain is severe incapacitating you completely , not allowing you to sit , then it is most likely to be a SCIATICA pain . It is due to compression of lumbosacral nerves at the level of the spine due to chronic bad posture or strain on the back or secondary to sudden jerk / lifting heavy weights.
You may visit your physician for an Xray spine to look for any wedging and scoliosis of spine causing lateral tilt of spine. This can be further treated with various specific physiotherapy exercises once diagnosed confirmtively after local examination and evaluation.
I hope i have answered your query in detail, wishing you good health,
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.