The technique of body mapping is one that has been developed by union colleagues in North and South America. It helps to get people talking about the effects of work on their health. It enables safety representatives to identify clusters of common problems and their causes. It gets workers thinking about possible solutions to problems. The principle behind it is simple. The body map is a chart showing the front and back view of a body. Using coloured pens or stickers, workers doing a particular type of job are encouraged to mark on the chart where they suffer pain or injury while they are working.