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1. to scrape or rub a surface lightly with the nails or with a sharp or jagged instrument, particularly to relieve itching.
2. a slight wound.
3. to make shallow cuts on a surface.
4. to make a thin grating sound.


(skrach) [ME. cracchen, to scratch]
1. A mark or superficial injury produced by scraping with the nails on a rough surface.
2. To make a thin, shallow cut with a sharp instrument.
3. To rub the skin, esp. with the fingernails, to relieve itching. Scratching temporarily relieves itching by soothing the cutaneous nerves, but in the long run, it may worsen the condition that caused the itching. See: pruritus

Patient discussion about scratch

Q. why do allergy effects comes usually in sorts of sneezing and scratching and more other thing like that?

A. It's because the substances released in the allergic reaction of the immune system to the allergen, like histamine, cause sensation of itching. They also cause increased secretion of mucus from the lining of the throat, which irritates the airway and cause sneezing.

You may read more here:

Q. Is there any information out there regarding a severe allergy to cat scratches? Is there any information out there regarding a severe allergy to cat scratches? I am not referring to "cat scratch fever" disease, but an allergy where the site of the scratch becomes swollen and red, and the person has hives and trouble breathing. Thanks so much!

A. Greetings Humble Earthling! It sounds like you have two or more things going on. First, cat scratch fever is caused by a parasite and comes on 1 to 2 weeks after the scratch. Allergic reactions are immediate.
Now, if the site of the scratch is swollen and red, that could be due to minor infection and just the process of healing.

More discussions about scratch
References in periodicals archive ?
It doesn't help to start from scratch against the surging Fighting Irish, one of the nation's surprise teams with a 4-0 record and No.
Sherman said a $1 billion project to tear apart the interchange and start from scratch just wouldn't be feasible, so lawmakers and transportation officials have to improve the interchange piece by piece.
Let's put the fund balance into the reserves and then start from scratch each year,'' Schillo said.
But the more we got into the process, we saw we needed a guy who could start from scratch.
A state funding board played political hardball with Los Angeles school officials Wednesday, saying the LAUSD must essentially start from scratch on the Belmont Learning Complex - or risk being denied as much as $33 million for its construction.
The county would better be able to hook into such a statewide system once it's established than to start from scratch now.