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Scratching is relieving an itch.
Yes, scratching an itch can be considered an instinctive behavior as it is a natural response to alleviate discomfort or irritation on the skin. It is believed to be a reflex action triggered by the nervous system in response to the sensation of itching.
It will make the itch a lot worse.
Scratching
It means you have an itch.
Turn Ben Stein On - 1999 Scratching Your Itch - 3.11 was released on: USA: 5 April 2001
An itch is a part of your skin which is irritated and when you scratch it you relive that irritation for some time, but you don't cure it. It is more likely that you will be more itchy after. The best thing to do is ignore it and your body will make the irritation heal.
The reason an itch seems to move when you start scratching your back is because the act of scratching stimulates new nerves. Rather than scratching, try using a warm compress or taking a shower.
Either because he/she has an itch and is scratching it or he/she is in pain there.
jock itch
Well i guess in a way you could become addicted to scratching it depends on what aspect. Addictions means your body has become hooked on it and begins to punish you for not supplying the means to satisfy it. Scratching can't really be an addictive type thing because the body only usually triggers it for an itch or for a sexual type action though it feels good when you scratch an itch your not really addicted because your not there for hours scratching that spot non stop
If he is scratching only his head, I'd say something is going on in his ear or ears.