The pain may be due to lower back muscle spasm.. Sometimes it is associated with neurological compression.. But if there are no neurological symptoms, than can be managed conservatively.
Next Steps
You can start with hot fomentation, take analgesic with muscle relaxant tablet, apply analgesic ointment locally over the site of pain, continue
calcium and vit supplements. You can start with physiotherapy, it will also help in relieving the pain..
Health Tips
Avoid heavy work, avoid sitting down, avoid Indian toilet, avoid forward bending..