what is a itch?and why does a scratch make it disappear?
Question:
Answers:
An itch is actually a form of pain transmitted by nerve fibers called cutaneous sensory neurons that are similar to those nerves that transmit pain. Therefore, the same stimulus that causes pain can cause an itch -- if it is experienced in a milder form.Scratching an itch provides only temporary relief, and, unfortunately, only leads to more itching. This is called the "itch-scratch-cycle, " which only makes matters worse. Some scientists believe that scratching actually helps the body release pain-relieving endorphins, but this has not been proven and scratching only provides temporary relief. Scratching may indeed scrape off a layer of skin, but this does not make the itch disappear and it can lead to more serious secondary infections.
Other Answers:
An itch is an iritated nerve ending. A scratch overstimulates the nerve ending causing it to shut down for a moment.
am itch is something very annoying and u scratch it just so you feel better like u've hurt it! When you are itchy, your nerve is over stimulated and iritated. It's actually a form of pain and is transmitted in the same way. Scratcging releives it because it stimulates the nerve and causes it to reset. However you can make it worse by scratching as a chewmical calleed histamine is released when the skin is irritated, eg by being scratched, which causes itching in itself so the "itch scratch" cycle begins. It is best not to scratch at all, or to take anti histamines.
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