If it is/was a pinched or restricted nerve, it's probably from an old injury from falling hard on @ss in the past. Low radiation spinal x-rays do show minor subluxation at lumbar at one point/disk, probably impact point that absorbed most of the damage.
The LWM4 is interesting, I've read both sides of the efficacy cases. It's difficult to justify the cost of producing the water though, not that plain tap water is a healthy alternative.
Do you think distilled water would do an approximately similar job to LWM4?