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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 ?
The samples were then scratched and evaluated by the three detection methods mentioned above.
Why doesn't the Kentucky Derby have an also-eligible list, which could have allowed the excluded Rock Hard Ten and Eddington to take the scratched horses' places in the field?
For comparison purpose, a smooth surface injection molded PP was scratched under the same condition as the surface-textured samples.
I almost threw the ticket away when she scratched it off and didn't think she had won anything.
A number of measurements were made at different positions along the scratch length for each sample to ensure that the data was a true representative of the characteristics of the scratched surface.
The following readers have scratched their way to Cash & Match prizes:-
In fact, 6 out of 10 people we talked to didn't even know scratched discs can be repaired.
Larger blocks (1 cm by 3 cm) of scratched samples of the four systems were utilized for the secondary mode observation.
With Alphabet Soup scratched from the $198,200 San Pasqual Handicap, Kingdom Found and jockey Gary Stevens won the 1-1/8-mile race by 2-3/4 lengths, missing Ancient Title's stakes record by only two-fifths of a second.
All over Scotland, thousands of readers have already scratched their way to super prizes thanks to our scratch cards - including ELEVEN pounds 50,000 prizes winners.
The very first ticket I scratched was the Harley-Davidson game and it was the winner.
A flatbed scanner with a resolution of 1200 dpi was used to scan the scratched surfaces in quantifying scratch damage.