hi,
your symptoms are suggestive of stiffness in muscles or history of jerk in lower back. first of all go for confirm diagnosis like x ray of lower back or MRI. then only start treatment. you can apply medicated oil on lower back. mahanarayan teil or til tail application on lowe back helps you out. just make it little warm and then apply it on paining area.
Next Steps
go for confirm diagnosis first.
Health Tips
dont lift heavy objects, try to take maximum rest.