Nociceptors
Specialized transducers in the skin, soft tissues, deep tissues, and viscera that convert different forms of energy (pressure, heat, cold, chemical changes) into electrochemical impulses (action potentials) that are transmitted up nerves.
Videos Mentioning Nociceptors

Control Pain & Heal Faster with Your Brain
Andrew Huberman
Sensors in the skin that detect particular types of stimuli, derived from the Latin word 'nocere' meaning 'to harm,' used in neuroscience to describe pain detection objectively.

345 ‒ Chronic pain: pathways, treatment, and the path to physical and psychological recovery
Peter Attia MD
Specialized transducers in the skin, soft tissues, deep tissues, and viscera that convert different forms of energy (pressure, heat, cold, chemical changes) into electrochemical impulses (action potentials) that are transmitted up nerves.

Red Meat, Deloads, and Pain with Dr. Michael Ray (Episode 22)
Stronger By Science
Sensory neurons that respond to potentially damaging stimuli by sending signals to the spinal cord and brain, involved in nociception but not directly pain itself.