Chronic pain can develop after a major injury or illness, such as a back injury
shingles, or it can happen without a known cause. It
is also possible that certain brain chemicals that usually suppress pain stop working the way they're supposed to.
Nerves and the nervous system. This type of pain happens because of pressure on nerves or damage to them from an injury or a health problem. Sometimes pain occurs when something goes wrong with the central nervous system. This can happen with diabetes, shingles, and sciatica, for example.
You can have more than one kind of pain at the same time. For example, fibromyalgia can cause pain in muscles and nerves.
In this article
This information is produced and provided by the National
Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National
Institute via the Internet web site at http://
.gov or call 1-800-4-CANCER.
WebMD Medical Reference from Healthwise
March 12, 2014
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this