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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.
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 lichen simplex chronicus; 698.4 Dermatitis factitia; 698.9 Pruritus NOS
Pruritus ani is the irritation of the skin at the exit of the rectum, known as the anus, causing the desire to scratch. [1] The intensity of anal itching increases from moisture, [2] pressure, and rubbing caused by clothing and sitting. At worst, anal itching causes intolerable discomfort that often is accompanied by burning and soreness.
Typically, senile pruritus is diagnosed following an exclusion process starting with a complete physical exam. If a person is exhibiting signs and symptoms of senile pruritus, a laboratory exam may not be recommended by a doctor at the initial doctor's visit unless there are other indicators of an underlying disease.
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.
Although the exact cause of PN is unknown, PN is associated with other dermatologic conditions such as untreated or severe atopic dermatitis and systemic causes of pruritus including liver disease and end stage kidney disease. [2] The goal of treatment in PN is to decrease itching. PN is also known as Hyde prurigo nodularis, or Picker's nodules ...
Notalgia paresthetica or Notalgia paraesthetica (NP) (also known as "Hereditary localized pruritus", "Posterior pigmented pruritic patch", and "subscapular pruritus" [1]) is a chronic sensory neuropathy.
[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 ]