I did physical therapy for lower back pain & sciatica. I was told the disc do have blood flow, just not much, but they will heal after being squished. It take

I did physical therapy for lower back pain & sciatica. I was told the disc do have blood flow, just not much, but they will heal after being squished. It takes months for my back to heal if I screw it up, so maybe that's what's going on.