Misleading Pain Receptors

Pain can be indicative of specific injury or damage to certain parts of the body, but at the same time, it can be misleading of the real cause of the 'pain', as in the phenomenon known as the referred pain. The evolutionary reason for referred pain is not known yet. This article discusses an example of referred pain, and it includes a brief explanation on the topic.

http://health.yahoo.com/experts/sportsnick/1411/when-pain-is-misleading