Why and how do body parts itch? Why does it feel good to scratch an itch?

Why Is My Butt Itchy? Possible Reasons for an Itchy Butt

Why does scratching inside the ear feel good? - Quora

What are itches? What is happening to your body to get an itch? Are they needed? - Quora

Why can't you stop scratching an itch?

Itch - Wikipedia

My skin swells and itches when something hits/scratches it. I know I have extremely sensitive skin, but what is this called? - Quora

Why is it healthy to scratch your butt? - Quora

Why Do Scabs Itch? Causes and How to Treat It

Itchy Lungs: Symptoms, Causes and Treatment

Ah! Why we scratch an itch › News in Science (ABC Science)

Does scratching an itch provide the body with any biological benefits? - Quora