Why Do We Itch?

The video explores the causes and physiology of itching, highlighting its mysterious nature. Itching can result from various factors, including skin conditions and unrelated health issues. A 2013 study revealed that itching is linked to neurons producing the neuropeptide Nppb. While blocking Nppb could stop itching, it also regulates sodium and blood pressure. Itching serves an evolutionary purpose by helping remove irritants. The video also discusses the contagious nature of itching, which may have evolved to alert others to potential threats.

What new insight or understanding did you gain from this video?