Back pain
An encouraging reccomendation from the National Institute for Clinical Excellence (NICE), (2009) says

"as a cost effective form of pain management, acupuncture should be made available on the NHS for the short term treatment of early, persistent, non specific lower back pain".

Causes of Back pain
Poor posture, over-strain, osteoarthritis, osteoporosis, 
obesity, pregnancy, sciatica, prolapsed disc, trauma.

People at risk of back pain
Drivers, nurses, plumbers, dancers, athletes, people that use their back for their work.