One in seven people worldwide will suffer from tinnitus (ringing in the ears) at some point. It is the most common injury arising from the conflicts in Afghanistan and Iraq and 75 pecent of 18 to 30 year-olds who go to nightclubs and concerts may experience temporary tinnitus. A research review (150 papers over 25 years) suggests that 94 percent of people are told nothing can be done. But help is at hand.