Former Detroit Lions defender Tracy Scroggins has died at the age of 56. His family stated that he battled the effects of chronic traumatic encephalopathy (CTE). Scroggins played 10 seasons for the ...

Alexandra Twin has 15+ years of experience as an editor and writer, covering financial news for public and private companies. Robert Kelly is managing director of XTS Energy LLC, and has more than ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Thomas J. Brock is a CFA and CPA with more ...

Pain comes from communication between nerves, the spinal cord, and the brain. Pain may be acute, chronic, neuropathic, or nociceptive. Acute pain is sudden and usually linked to injury, then improves ...