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Prurigo is a reactive skin condition distinguished by numerous, isolated itchy papules. [1] The word "prurigo" comes from the Latin word pruire, which meaning itching. Ferdinand von Hebra coined the term "prurigo" in Vienna in 1850 to describe papules and nodules that had severe pruritus . [ 2 ]
Dermatographic urticaria is sometimes called "skin writing", as it is possible to mark deliberate patterns onto the skin. The condition manifests as an allergic-like reaction, causing a warm red wheal to appear on the skin. As it is often the result of scratches, involving contact with other materials, it can be confused with an allergic ...
A rash is essentially inflammation in the skin that can be caused by either an external exposure or an internal factor,” says Joshua Zeichner, M.D., director of cosmetic and clinical research in ...
[1] [2] The rash consists of macular lesions that are red and usually 2–10 mm in diameter but may be confluent in places. [3] A morbilliform rash is a rose-red flat or slightly elevated (maculopapular) eruption, showing circular or elliptical lesions varying in diameter from 1 to 3 mm, with healthy-looking skin intervening. [citation needed]
Atopic dermatitis is also associated with the release of pruritogens (molecules that stimulate pruritus or itching) in the skin. [33] Keratinocytes, mast cells , eosinophils and T-cells release pruritogens in the skin; leading to activation of Aδ fibers and Group C nerve fibers in the epidermis and dermis contributing to sensations of pruritus ...
In addition to the appearance and distribution of the rash, specific medical signs may be used by medical practitioners to assist with diagnosis. These may include Auspitz's sign (pinpoint bleeding when the scale is removed), Koebner phenomenon (psoriatic skin lesions induced by trauma to the skin), [ 20 ] and itching and pain localized to ...
Also, the area of the skin on which the symptoms appear tends to be different with every type of dermatitis, whether on the neck, wrist, forearm, thigh or ankle. Although the location may vary, the primary symptom of this condition is itchy skin. More rarely, it may appear on the genital area, such as the vulva or scrotum.
The skin weighs an average of four kilograms, covers an area of two square metres, and is made of three distinct layers: the epidermis, dermis, and subcutaneous tissue. [1] The two main types of human skin are: glabrous skin, the hairless skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [3]