The pain organ is neuro-endocrine but only rarely chemical. It communicates with the bod via quantum tunneling (like photosynthesis, like smell) and cannot be seen with current imaging technology except as a possibility. It has been guessed at, its shadow glimpsed in MRIs, the sketches of pain victims. It is often mistaken for a tumor, but its removal results not in cessation of pain, but its increase as it escapes into the rest of the body. Occasional its removal results in death. Pain cannot be contained; it always has a remainder.