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A bruise, also known as a contusion, is a type of hematoma of tissue, [3] the most common cause being capillaries damaged by trauma, causing localized bleeding that extravasates into the surrounding interstitial tissues. Most bruises occur close enough to the epidermis such that the bleeding causes a visible discoloration.
The slow process of reabsorption of hematomas can allow the broken down blood cells and hemoglobin pigment to move in the connective tissue. For example, a patient who injures the base of their thumb might cause a hematoma, which will slowly move all through their finger within a week. Gravity is the main determinant of this process.
In contrast, humans are less averse to the white noise than to scraping. [4] A 1986 study used a tape-recording of a three-pronged garden tool similar to a fork being "grided" across a chalkboard, which roughly reproduces the sound of fingernails on chalkboard. The recording was then manipulated, removing pitches at the extremities and the median.
Abrasions usually involve minimal bleeding. [2] Mild abrasions, also known as grazes or scrapes , do not scar or bleed because the dermis is left intact, but deep abrasions that disrupt the normal dermal structures may lead to the formation of scar tissue.
HAVS, also known as vibration white finger (VWF) or dead finger, [1] is a secondary form of Raynaud's syndrome, an industrial injury triggered by continuous use of vibrating hand-held machinery. Use of the term vibration white finger has generally been superseded in professional usage by broader concept of HAVS, although it is still used by the ...
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Symptoms include purple spots on the skin (actually sucker marks left by a purple pentapus). The inhabitants of Omashu pretended to be infected with pentapox to escape the Fire Nation-occupied city. Petrifold regression Doctor Who ("New Earth") A condition that causes the affected person to turn to stone (similar to petrification). Unknown origins.