This is the most common problem I see as a practitioner. Back pain is so common, in particular in the lower back. Many people I see have no underlying problem but are doing lots of driving or holding themselves in such a way as to cause back or sciatic pain. The pain can be continual until the body is treated.
Sciatica often presents itself as pain in the buttock, down the leg and into the knee. It can even stretch into the ankle.
Treatment involves treating the whole body, then focusing on very specific moves on the lower back.
Bowen is wonderful for treating back pain and sciatica, and in my experience usually gets rid or significantly reduces pain in just 2 treatments. It can also prevent the pain returning.