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Scraping a chalkboard (also known as a blackboard) with one's fingernails produces a sound and feeling which most people find extremely irritating. The basis of the innate reaction to the sound has been studied in the field of psychoacoustics (the branch of psychology concerned with the perception of sound and its physiological effects).
However, there are hedonic aspects to scratching, as one would find noxious scratching highly pleasurable. [2] This can be problematic with chronic itch patients, such as ones with atopic dermatitis, who may scratch affected spots until they no longer produce a pleasant or painful sensation, instead of when the itch sensation disappears. [8]
As it is often the result of scratches, involving contact with other materials, it can be confused with an allergic reaction, when in fact it is the act of being scratched that causes a wheal to appear. These wheals are a subset of urticaria (hives), and appear within minutes, in some cases accompanied by itching. The first outbreak of ...
[2] [4] Common forms of self-harm include damaging the skin with a sharp object or scratching with the fingernails, hitting, or burning. The exact bounds of self-harm are imprecise, but generally exclude tissue damage that occurs as an unintended side-effect of eating disorders or substance abuse , as well as more societally acceptable body ...
In very rare cases, it’s possible for a cat scratch to pass along something more serious than CSD, like rabies, a viral disease that is almost always fatal once symptoms appear. However, it’s ...
Recurrent scratching, especially over the same area can lead to skin thickening which may prevent some medications from effectively working to treat the chronic itch. Senile pruritus can have a significant impact on the quality of life.
Aluminum-based antiperspirants have gotten a bad rap over the last few years because some small studies have suggested potential links between using the products and developing breast cancer. But ...
Scarification involves scratching, etching, burning/branding, or superficially cutting designs, pictures, or words into the skin as a permanent body modification or body art. The body modification can take roughly 6–12 months to heal.