I cure my backaches with 528 hz. Meditate to a 528 hz meditation, and watch your backache disappear on rising. I experienced this before reading about the reparative properties of 528 hz. This is reinforced by the fact that body harmonics (frequencies that are in tune with your natural DNA resonance) control your spinal fluid, which protects your spine.
Don’t think about it too much. You may experience that halfway through the meditation, you still feel your back. Take it off your mind. Off of mind, off of body. By the end, without thinking about it, you will notice that the pain is mostly if not completely gone. This is due to the harmonic circulating and redistribution of your spinal fluid to where it was needed. I do this to a 40-45 minute meditation.