This problem can be due to stiffness in the back muscles.. Sometimes, it may also be due to stiffness in the joints in lumbar vertebra
Next Steps
If it is there for a long time, you should get some investigations done like x ray to rule out any bony changes or any arthropathy. You can start with hot fomentation, take analgesic with muscle relaxant, take
calcium and
vitamin d supplement, apply analgesic ointment locally.. If not relieved, plan to get inflammatory markers tested along with HLA B27 to find out the cause..
Health Tips
Avoid heavy work, avoid sitting down, start with back strengthening exercises.