We usually advise lumbosacral belt for patients with acute vertebral fractures or with any slip of one vertebra over the other. For backache, you can wear it for some time if it relieves your pain but don't make it a habit to wear it all the time.
Next Steps
You need to get an MRI of your spine and see what the problem is, then get appropriate treatment.
Health Tips
Do back strengthening exercises and core strengthening exercises