Chronic Pain (cont.)
IN THIS ARTICLE
The cause of chronic pain is not clear. When you have an injury or illness, certain nerves send pain signals to your brain. With chronic pain, these pain signals continue for weeks, months, or even years after you recover. Chronic pain can develop after a major injury or illness, such as a back injury or shingles, or it can develop without a known cause. It is also possible that certain brain chemicals that usually suppress pain may not work properly.
Pain can affect:
You can have more than one kind of pain at the same time. For example, fibromyalgia can cause pain in muscles and nerves.
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