Stearic Stain Phenomenon

One of the characteristic manifestations of psoriasis is the formation of soft silvery-white scales on the surface of papules, which are easily separated when scraped. This phenomenon is called the “stearin stain phenomenon” because of its external resemblance to drops of frozen stearin.

With psoriasis, accelerated renewal of epidermal cells occurs, as a result of which dead cells accumulate on the surface of the skin, forming characteristic scales. These scales easily separate from the underlying layers of skin, leaving behind bright pink spots with clear boundaries.

The stearin stain phenomenon is one of the important diagnostic criteria for suspected psoriasis. Its presence helps dermatologists quickly recognize this disease and prescribe the necessary treatment. The characteristic silvery-white glow of the scales and their easy separation from the skin make the stearin stain phenomenon an important marker of psoriasis.

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The quilting spot phenomenon is the appearance of whitish-gray (sometimes yellow) shiny scales as a result of scraping an area of ​​papular superficial infiltration. This is an optional sign and may be a manifestation of plaque psoriasis