There are two distinct forms of the acute pain caused by trauma such as physical and chronic disorders that can cause a person for years, and is currently used ultrasound to relieve chronic pain.
Acute pain can be caused by physical trauma and is usually treated with analgesics.
Reason for study, this type of pain according to the researchers is actually a behavioral state that begins with the actual injury but where the pain lasts more than enough time and then become pathology.
Patients suffering from arthritis for example depends on analgesics are powerful enough to soothe the pain and this commonly come a situation that becomes cyclical pain from inactivity and finally to depression.