This pattern strongly suggests a mechanical issue, such as a muscle strain or pressure on your spinal discs, where gravity and weight-bearing add strain when you stand. Mobizox (which contains the pain relievers diclofenac and paracetamol, along with the muscle relaxant chlorzoxazone) helps reduce inflammation and muscle spasms, but oral medication alone often cannot fully overcome the physical pressure on your spine when you are upright. Please rest, avoid bending or lifting, and consult a doctor for a physical evaluation to safely guide your recovery.