According to a 2018 study released by The Centers for Disease Control and Prevention (CDC), nearly 50 million Americans are affected by chronic pain. This is not to be confused with acute pain, which is the body's reaction to a physical injury and typically doesn't last very long; the pain usually subsides as your body heals.
Chronic pain, on the other hand, is pain that doesn't go away in 3 months or more. This type of pain produces symptoms that can occur continuously or on an intermittent basis, and may fluctuate in intensity, depending on any number of factors such as time of day or level of physical activity. The causes of chronic pain may vary widely from one individual to the next.
Though chronic pain differs from acute pain in that it may result from a number of long-term conditions, the chronic pain can also be ‘extension’ of an original injury, wherein the initial cause of pain has healed, but the body’s pain processing signals continue to ‘fire’, rather than turning themselves off.
The more typical types of chronic pain, however, can be broken down into two different major categories: