Back pain with a lateral shift commonly occurs due to a disc bulge, where the protruding disc material irritates a nerve root. This causes the trunk to deviate away from the painful side as a protective, antalgic posture to reduce nerve compression. Patients typically present with asymmetrical posture, restricted spinal movements, and pain that may radiate into the lower limb. Early identification of the lateral shift is important, as appropriate correction and targeted physiotherapy can help reduce pain, restore alignment, and prevent chronic dysfunction.
