What is pain?

Pain is a signal from the nervous system that something may be wrong and it can be a symptom of many conditions. It is an unpleasant feeling, such as a prick, sting, burn, or ache. Pain can be sharp or dull, and it may be temporary, intermittent, or constant.^[1]

A revised definition of pain from the International Association for the Study of Pain (IASP) is as follows: “an unpleasant sensory and emotional experience associated with, or resembling that associated with, actual or potential tissue damage.”^[2]