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Dermatosis papulosa nigra (DPN) is a condition of many small, benign skin lesions on the face, a condition generally presenting on dark-skinned individuals. [1]: 638–9 DPN is extremely common, affecting up to 30% of Black people in the US. [2]
An itch (also known as pruritus) is a sensation that causes a strong desire or reflex to scratch. [1] Itches have resisted many attempts to be classified as any one type of sensory experience. Itches have many similarities to pain , and while both are unpleasant sensory experiences, their behavioral response patterns are different.
696.5 Other and unspecified pityriasis; 696.8 Other psoriasis and similar disorders; 697 Lichen. 697.0 Lichen planus; 697.1 Lichen nitidus; 697.8 Other lichen not elsewhere classified; 697.9 Lichen unspecified; 698 Pruritus and related conditions. 698.0 Pruritus ani; 698.1 Pruritus of genital organs; 698.2 Prurigo; 698.3 Lichenification and ...
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] Some authors categorize prurigo based on its nature (acute, subacute, or chronic), clinical manifestation, underlying cause, or related illness. [3]
According to a study, most of the people who experience pruritus daily have increased itching sensations and other associated symptoms during the night. Most studies reveal that senile pruritus is more common in men than women. [3] Common symptoms of senile pruritus include: [3] pain; heat sensation; cold sensation; bumps, blisters or spots ...
[9] The dermis is the layer of skin between the epidermis and subcutaneous tissue, and comprises two sections, the papillary dermis and the reticular dermis . [ 10 ] The superficial papillary dermis interdigitates with the overlying rete ridges of the epidermis, between which the two layers interact through the basement membrane zone. [ 10 ]
People who are experiencing aortic dissection, meanwhile—a tear in one of the body’s major arteries—describe sudden, stabbing pain in the middle of the chest that radiates to their back.
Pruritus can be seen with hepatic and renal disease such as cholestasis, alcoholic liver disease, primary biliary cholangitis, hepatitis B and C, and chronic kidney disease. [ 5 ] [ 6 ] [ 7 ] Drug and alcohol use can contribute to pruritus as well so it is worthwhile to gather a social history.