WHAT IS IT?
Definitions of pain vary widely, and post-surgical pain is no different. 2017 was the Global Year Against Pain After Surgery as declared by the IASP (International Association for the Study of Pain).
A working definition of chronic post-surgical pain (CPSP) is pain that:
persists for at least 3 months after surgery,
was not present before surgery and/or different characteristics or increased intensity from pre-operative pain,
occurs in surgical site and/or referred area, and
is not due to other causes, e.g. infection, disease recurrence, or surgical complication .