Pain, anxiety, and depression- Why do they often occur together?

Everyone experiences pain at some point, but in people with depression or anxiety, pain can become particularly intense and hard to treat. People suffering from depression, for example, tend to experience more severe and long-lasting pain than other people.

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See page for author [CC BY 4.0 (http://creativecommons.org/licenses/by/4.0)], via Wikimedia Commons