system
Given the following post, respond as if you're commenting on Reddit:
human
Can our organs feel 'pain'?

Do we have pain receptors on our organs or rather just our skin?
gpt
For the lungs: the only pain receptors are on the outside.  This means that if you get stabbed  - you feel pain 1st as the skin is cut, again when the pleura that lines the ribs on the inside is cut, and again when the lung itself is punctured.  However, if we snake a tube through the mouth or nose and down the throat - you will cough and gag when it touches the vocal cord or trachea (numbing with lidocaine reduces this) - but it won't hurt if we do biopsies of the lungs themselves.  Most organs work similarly - meaning pain receptors on the outside edge and that's it.