Can a brace heal a L5 bilateral stress fracture after being misdiagnosed for 6 months? It takes pain away from my back does that mean it's healing it?

Stress fracture. Your body can heal stress fractures -- the brace does not health them. However, the brace stabilizes your back, allowing healing to occur. Sometimes these fractures happen in athletes, and they need to temporarily stop the activity they were involved in while the healing process evolves.