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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.
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.
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]
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 ...
From ticks to spiders to bed bugs, here’s what the most common bug bites look like in photos, the symptoms to know, and whether or not they can be dangerous.
No definitive medical test is known for aquagenic pruritus. Rather, diagnosis is made by excluding all other possible causes of the patient's itching, including polycythemia vera. Since pruritus is a symptom of many serious diseases, it is important to rule out other causes before making a final diagnosis. [11]