Your back pain could be due to weak back muscles or muscle spasm.
How long do you have this pain? Is it radiating? Is it continuous or intermittent?
Next Steps
You should give hot water fomentation for 15-20 minutes twice a day.
You can use Volini gel or spray provided you are not allergic.
You should do back stretching and strengthening exercises with proper guidance.
Avoid prolonged standing or sitting take breaks in between work.
Avoid bending activities and weight lifting.
Maintain the correct sitting posture.
Health Tips
If the pain persists or aggrevates you need to consult a Physiotherapist or Orthopaedist for further evaluation and treatment either in person or through video call.