Philosophers say, what is pain? Thank you

Pain is a subjective feeling. As early as 1968, pain management expert Margo McCaffery first proposed a definition commonly used in the nursing community: "When a person says he feels pain, it is pain; when he says the pain is still there, it is pain. The pain is still there." (Original text: Pain is whatever the experiencing person says it is, existing whenever he says it does)

The famous philosophical proposition of the French philosopher Descartes is called "I think, therefore I am." (Latin: "Cogito, ergo sum"; French: "Je pense, donc je suis"; English: "I think, therefore I am") Using the so-called "skeptical method" is to verify whether the source of "knowledge" is reliable. We can doubt everything around us, but there is only one thing that we cannot doubt, and that is: doubting the existence of the "I" who is doubting. In other words, we cannot doubt "our doubts" because only in this way can our "doubts" be confirmed.

"If a person says he feels pain, it is pain; if he says the pain is still there, the pain is still there."

"I think, therefore I am"

Do you feel that they are different but have the same effect? It would be interesting to think deeply about philosophical issues

Descartes