Pain is one of our senses – like vision, hearing, or taste. It aids our survival by identifying noxious and harmful stimuli. But unlike the other sensations, it's ethically challenging for us to study pain. Instead, we rely on animal studies. Pain’s underlying physiology is understood, but not our experience of pain, unlike other sensations that we can readily share, like listening to music or watching a sunset. That difference makes it difficult to treat.
