❓ why
Why do we itch?
ScienceBiologyHuman Body
Quick Answer
Itching is a protective sensation that prompts us to scratch away irritants like insects, dust, or parasites from the skin.
The Full Story
An itch, medically called pruritus, is triggered when specialised nerve endings in the skin detect irritation — from an insect, a chemical, dry skin, or an allergic reaction — and send signals to the brain. Scratching temporarily relieves the itch by replacing it with a mild pain signal that distracts the brain, but it can also worsen irritation in a frustrating itch-scratch cycle. Like pain, itching evolved as a warning system to remove potentially harmful things from the body surface.
Key Facts
1.The medical term for itching is pruritus
2.Scratching replaces the itch with a mild pain signal
3.Itching evolved as a skin defence mechanism
YouTube Angle
Suggested video title for this topic:
"Why We Itch — And Why Scratching Feels So Good"