itch


Also found in: Dictionary, Thesaurus, Medical, Legal, Acronyms, Idioms, Wikipedia.
Related to itch: jock itch, winter itch

itch

any skin disorder, such as scabies, characterized by intense itching

Itch

 

a distressing sensation caused by constant weak irritation of the cutaneous nerve endings that are pain receptors and accompanied by the need to scratch the skin.

Itching may be stimulated by a number of metabolic products—for example, bile acids in jaundice. There is localized and universal (generalized) itching. Localized itching is found in certain inflammatory diseases of the skin. Causes of universal itching may be diseases of the skin proper, diseases of various internal organs (jaundice, diabetes mellitus); certain allergic states, and decrease in function of the sex glands. The very notion of a habitual source of itching familiar through past experience (for example, an insect bite) may produce the corresponding sensation of itching (conditioned-reflex itching). Itching may be chronic or come in attacks lasting from a few hours to many weeks. Scratching leads to disruption of the integrity of surface layers of the skin and to infection of itching areas, which may cause a secondary inflammatory disease of the skin.

Treatment of an itch consists in eliminating the disease that is causing it. Sedatives (bromine, valerian, calcium preparations) are prescribed and menthol and sea baths are applied externally. Hormone preparations are used for climacteric and geriatric itching. Localized itching can be prevented by the observance of personal hygiene.

V. S. ROTENBERG

itch

[ich]
(physiology)
An irritating cutaneous sensation allied to pain.
References in periodicals archive ?
It's exciting to see results here with significant and highly meaningful improvements in both worst itch as well as a recovery in the lesions for patients in the study," said Gil Yosipovitch, MD, Professor of Dermatology, Miller School of Medicine, and Director of the Miami Itch Center at the University of Miami as well as an investigator in this study.
Yosipovitch said the gel is most effective on nonhistaminergic itches, including those with a neurogenic component, nummular eczema, and facial itch.
If a light touch taps into the itch accelerator, then these nerve cells are the brakes, says coauthor Martyn Goulding, a neuroscientist at the Salk Institute for Biological Studies in La Jolla, Calif.
When those genetically engineered mice were injected with a substance that normally makes the skin itch, the mice didn't scratch as much as their normal littermates.
This result is an itch/scratch/pain/ itch vicious cycle.
We also know that certain medications used for other conditions may help, depending on your itch trigger.
The Columbus Itch Scratcher is also in patent pending status with the United States Patent and Trademark Office.
The researchers found that in chronic itching, neurons that send itch signals also co-opt pain neurons to intensify the itch sensation.
Consider psychogenic itch in patients who have recurring physical symptoms and demand examination despite repeated negative results.
When they exposed the mice itchy substances, they did not itch.
Both Kazerouni and her fiance are privileged cardholders and were treated well until she developed an itch.
If people are shopping for general itch relief, it is in the OTC section, but for relief due to mosquitoes or other insect bites, it can be repeated on a clip strip or tray in the pest repellent aisle," says Eric Rubel, COO of Linden, N.