I always have sudden back pain. and i observed that it looks like i have lordosis. its very uncomfortable to move then the feeling will go away. please help me?

Doctor can examine: If in lower back, some causes of pain there include: back muscle strain, back ligament sprain, fractured vertebra (spondylolysis), slipped vertebra (spondylolisthesis), malformed vertebra, herniated disc, spinal stenosis, spinal arthritis, urine infection, kidney problem; tumor in the spine, kidney, or elsewhere, etc... With such a big list of possibilities, one's doctor needs to evaluate.