Normal and Pathological Referred Itch
Referred itch is the class of referred sensation that focuses on the situation in which an itch in one place on the body simultaneously triggers an itch in a different location. Other examples of referred sensation include sensations of temperature, pain, and pressure. Referred itch is commonly observed in completely healthy individuals and can often go unnoticed depending upon the particular person’s self-awareness of their itches and the causes of those itches. The ephemeral nature of referred itch and its restriction to a very small area on one’s body (the itch is precisely located, it does not induce widespread itching) make it difficult to document or even notice.
The majority of the cases of referred itch studied by experimenters occur in healthy individuals. Furthermore, referred itch itself does not confer any adverse effects on the health of those experiencing it. With the exception of the annoyance of feeling multiple itches and a potentially minuscule feeling of pain, it is an innocuous condition. The cause of referred itch in healthy individuals is still not known for certain, but there are a multiple recorded cases of referred itch being triggered by certain pathological stimuli.
Two men developed temporary referred sensation after suffering from shingles. Here, the referred sensation occurred in the areas previously affected by the shingles. Another man who suffered from hyperpathia and reduced nerve functioning later experienced referred itch in conjunction with his pathology. This evidence suggests that although referred itch occurs spontaneously in healthy individuals, certain pathologies make it possible to acquire the condition, even if only temporarily.
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