What is an itch and why does a scratch make it feel better?

Answer 1

because scratching distracts the nerves from the itch

Answer 2

Itch is a common problem. Itches can be localized (limited to one area of the body) or generalized (in which itching occurs all over the body or in several different areas). Generalized itch, for obvious reasons, is more difficult to treat. Itches can also occur with or without skin lesions (e.g., bumps or blisters). An itch that is accompanied by lesions usually should be evaluated by a physician and, in some cases, by a dermatologist since the problem is likely to be a condition that requires specialized medical treatment (e.g., eczema, scabies, etc). This article is limited to itch that is not associated with skin lesions.

Itch accompanies many conditions. Probably the most common cause of itch is psychological, that is, due to stress, anxiety, etc. Stress also can aggravate itch from other causes. Dry skin is another frequent cause of itch. Other causes include metabolic and endocrine disorders (e.g., liver or kidney disease, hyperthyroidism), cancers (e.g., lymphoma), reactions to drugs, infestations of the skin (e.g., body lice), and diseases of the blood (e.g., polycythemia vera). Most people who itch, however, do not have a serious underlying condition.

Itching usually prompts scratching, which can sometimes lead to a vicious itch-scratch cycle. Scratching can initially feel so satisfying - but prolonged scratching just leaves you with irritated skin that can still itch! Since scratching provides only temporary relief and doesn't promote healing of the underlying problem, it is best to avoid scratching if at all possible. If scratching breaks open the skin, bacterial infection can set in. And if scratching continues for many months or years, the area that is scratched may develop thickened skin (lichenification) or pigmentation that darkens the area.

The best way to allow irritated skin to heal is to stop scratching it. However, will-power often is not enough since the urge to itch can be compelling. Here are some general measures to help control itch, regardless of the cause.

Answer 3

Dead skin cells like sharp edged plates stimulate nerve endings OR your immune system is responding to a toxin(bug bite,poison ivy,etc.).
Amazingly enough,when you scratch it causes mild pain,which our brain prefers over the annoying itch!

Answer 4

an itch is a blood vessel near the skin that is constricting and needs to be touched in order for the vessel to open again.

Answer 5

what planet r u from?