The most typical cause of darkened areas of skin, brown spots or areas of discoloration is unprotected sun exposure.

As in photography ( where silver is used due to its reactivity with light ), these particles in the skin darken with exposure to sunlight, resulting in a blue or gray discoloration of the skin.

As in photography ( where silver is used due to its reactivity with light ), silver particles in the skin darken with exposure to sunlight, resulting in a blue or gray discoloration of the skin.

Slow oxidation may occur upon prolonged exposure to air usually causing blue discoloration.

* Seldom: tooth discoloration, tooth enamel erosion, and premature tooth decay, all from prolonged oral exposure to the suspension

" White Lucent " is used to lighten the appearance of skin discoloration due to sun exposure.

Rarely, there may be cyanosis ( bluish discoloration of the skin due to low oxygen levels ), altered level of consciousness, a hyperresonant percussion note on examination of the affected side with hyperexpansion and decreased movement, pain in the epigastrium ( upper abdomen ), displacement of the apex beat ( heart impulse ), and resonant sound when tapping the sternum.

He was called the Leper King because discoloration and moss growing on the original statue was reminiscent of a person with leprosy, and also because it fit in with a Cambodian legend of an Angkorian king who had leprosy.

As a result, Schmidt suffered the facial disfigurement attributed to the Dust, as his face took on the appearance of a living red skull ; his head is hairless and its skin has shriveled, clinging tightly to his actual skull, and has taken on a red discoloration.

This overcoating ( which has numerous names depending on the manufacturer ) is also stored on the ribbon and is effectively a thin laminate which protects the print from discoloration from UV light and the air, while also rendering the print water-resistant.

The man exhibits dyspepsia and extremely foul flatulence but claims that these are the result of eating berries and lichen while he was lost ; he has a reddish discoloration on his face, which he dismisses as an allergic rash.

Great shaft wood has a very consistent grain, and no marks or discoloration.

Since her death, Soubirous's body has apparently remained internally incorrupt, but it is not without blemish ; during her third exhumation in 1925, the firm of Pierre Imans made light wax coverings for her face and her hands due to the discoloration that her skin has undergone.

Additionally acanthosis nigricans has similar visual characteristics ( neck discoloration ) with Casal collar, which is a symptom of pellegra ( a nutrient deficiency disease, easily remedied with supplementation ).

The industry leader ( Trex Corporation ) has been involved in numerous lawsuits with home owners and installers in regards to mildew, discoloration and increased weakness in the fiber of the materials.

:" When a person has on the skin of his body a swelling, a rash, or a discoloration, and it develops into a scaly affection of the skin of his body, it shall be reported to he shall be brought before Aaron the priest or to one of his sons, the priests.

" Modern window film technology has created Ceramic Window Film which are non-metallic and do not contain dyes that can result in discoloration.

The blood has been absorbed, but the iron-laden pigments in the blood remain in the tissue leaving a discoloration that may persist for several weeks or months.

Signs that a plant has been attacked by lygus bugs include discoloration, deformation of shoots and stems, curling of leaves, and lesions on the plant tissues.

This huge pink gem has an unusual flaw: looking deeply into the stone, one perceives a tiny discoloration resembling a leaping panther.

A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding chromium to form stainless steel.

More severe forms include livedo reticularis, which is a network ( reticulum ) of erythematous to purplish discoloration of the skin caused by the presence of an obliterative cutaneous capillaropathy.

In 1794, shortly after his arrival in Manchester, Dalton was elected a member of the Manchester Literary and Philosophical Society, the " Lit & Phil ", and a few weeks later he communicated his first paper on " Extraordinary facts relating to the vision of colours ", in which he postulated that shortage in colour perception was caused by discoloration of the liquid medium of the eyeball.

Typically, only one or a small number of phytoplankton species are involved, and some blooms may be recognized by discoloration of the water resulting from the high density of pigmented cells.

Irving's intention in Hitler's War to clean away the " years of grime and discoloration from the facade of a silent and forbidding monument " to reveal the real Hitler, whose reputation Irving claimed had been slandered by historians.

Livor mortis is a settling of the blood in the lower ( dependent ) portion of the body, causing a purplish red discoloration of the skin: when the heart is no longer agitating the blood, heavy red blood cells sink through the serum by action of gravity.

This pure solvent rinse prevents discoloration caused by soil particles being absorbed back onto the garment surface from the " dirty " working solvent.

On September 16, 2012, Mei Xiang gave birth to another giant panda cub, believed by zoo officials to have been a female, but it died after about a week ( initial results from a necropsy-animal autopsy-revealed the abnormal presence of fluid in the abdomen, and also, discoloration of the liver, or hepatic, tissue, of as yet unknown etiology ; full, definitive results will likely be available in about two weeks ; the cub had managed to nurse before death because milk was found in its system ).

Many of the symptoms are similar to epididymitis though epididymitis may be characterized by discoloration and swelling of the testis, often with fever, while the cremasteric reflex is not affected.

Many thrips are pests of commercial crops due to the damage caused by feeding on developing flowers or vegetables, causing discoloration, deformities, and reduced marketability of the crop.

Cyanosis is defined as a bluish discoloration, especially of the skin and mucous membranes, due to excessive concentration of deoxyhemoglobin in the blood caused by deoxygenation.

It can result in discoloration, thickening, chalkiness, or crumbling of the nails and is often treated by powerful oral medications which, rarely, can cause severe side effects including liver failure.

Very large AVMs cause a marked inability to absorb oxygen, which may be noted by cyanosis ( bluish discoloration of the lips and skin ), clubbing of the fingernails ( often encountered in chronically low oxygen levels ), and a humming noise over the affected part of the lung detectable by stethoscope.

Symptoms vary by tree species but generally consist of leaf discoloration, wilt, defoliation, and death.

Embossing tape is " printed " by pressing raised elements similar to printing type onto it, which produces raised glyphs that look white due to discoloration of the plastic.

Screen burn-in, image burn-in or ghost image, colloquially known as screen burn, is a permanent discoloration of areas on an electronic display such as a cathode ray tube ( CRT ) display or computer display monitor or television set caused by cumulative non-uniform usage of the pixels.

Linen and cotton that are white may also become yellow over time, but this is eliminated by bleaching, either with liquid bleach, or by the traditional method of hanging the linens in the sun to let the sunlight bleach out the discoloration.

In its most severe form, tooth appearance is marred by discoloration or brown markings.

Check the diameter edge for discoloration ( blue oxidation ) indicating an overheating condition caused by insufficient cooling water / air.

In addition, verdigris is a fickle pigment requiring special preparation of paint, careful layered application and immediate sealing with varnish to avoid rapid discoloration ( but not in the case of oil paint ).

Recently, the use of herbal mouthwashes such as persica is increasing, due to the perceived discoloration effects and unpleasant taste of chlorhexidine.

Severe hypoxia induces a blue discoloration of the skin, called cyanosis.

Papersave caused " discoloration, white deposit, Newton rings, bleeding of inks and dyes, odor and different ' feel ' of the paper.

One application is to formulas for washing and conditioning grey or blonde hair, where the brightener can not only increase the luminance and sparkle of the hair, but can also correct dull, yellowish discoloration without darkening the hair.

Red tide is a common name for a phenomenon also known as an algal bloom ( large concentrations of aquatic microorganisms ), an event in which estuarine, marine, or fresh water algae accumulate rapidly in the water column and results in discoloration of the surface water.

Not all algal blooms are dense enough to cause water discoloration, and not all discolored waters associated with algal blooms are red.

# Red tides are not necessarily red and many have no discoloration at all.

Most patients ( over 80 %) have vascular symptoms and Raynaud's phenomenon, which leads to attacks of discoloration of the hands and feet in response to cold.

* A brownish-blue shiny skin discoloration near the affected veins.

Skin may either appear lighter or darker than normal ; there may be blotchy, uneven areas, patches of brown to gray discoloration or freckling.

The discoloration and health of butterflies in butterfly farms, is now being studied for use as indicators of air quality in several cities.

* Mongolian spot: congenital large, deep, bluish discoloration on the back of Asian babies.

However, when present in high enough numbers, they may appear as a green discoloration of the water due to the presence of chlorophyll within their cells ( although the actual color may vary with the species of phytoplankton present due to varying levels of chlorophyll or the presence of accessory pigments such as phycobiliproteins, xanthophylls, etc.

Areas of temporary skin discoloration may appear and are sometimes due to healed injuries.

Yellow discoloration of the skin, especially on the palms and the soles, but not of the sclera and mucous membranes ( i. e. oral cavity ) is due to carotenemia — a harmless condition important to differentiate from jaundice.

Systemic disorders also can cause tooth discoloration.

Blue discoloration may occur with alkaptonuria and rarely with Parkinson's disease.

Another disease is impatiens necrotic spot virus which causes brown or yellow spots on leaves, rings, black or brown stem discoloration, and brown leaf veins, ultimately resulting in plant death.