generate questions: Pain is a distressing feeling often caused by intense or damaging stimuli, such as stubbing a toe, burning a finger, putting alcohol on a cut, and bumping the "funny bone". Because it is a complex, subjective phenomenon, defining pain has been a challenge. The International Association for the Study of Pain's widely used definition states: "Pain is an unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage." In medical diagnosis, pain is a symptom.
What type of stimuli causes pain? {sep_token} What type of feeling is pain? {sep_token} Why has defining pain been a challenge? {sep_token} What organization's definition is widely used? {sep_token} In medical diagnosis, what is pain considered? {sep_token}