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Formication is the sensation resembling that of small insects crawling on (or under) the skin, in the absence of actual insects. It is one specific form of a set of sensations known as paresthesias, which also include the more common prickling, tingling sensation known as pins and needles. Formication is a well-documented symptom which has ...
Paresthesia, also known as pins and needles, is an abnormal sensation of the skin (tingling, pricking, chilling, burning, numbness) with no apparent physical cause. [1] Paresthesia may be transient or chronic, and may have many possible underlying causes. [ 1 ]
Pain is variable, from discomfort to very severe, and may be described as burning, stabbing, or gnawing. Signs: [citation needed] Area of previous herpes zoster may show evidence of cutaneous scarring. Sensation may be altered over the areas involved, in the form of either hypersensitivity or decreased sensation.
Dysesthesia is distinct in that it can, but not necessarily, refer to spontaneous sensations in the absence of stimuli. In the case of an evoked dysesthetic sensation, such as by the touch of clothing, the sensation is characterized not simply by an exaggeration of the feeling, but rather by a completely inappropriate sensation such as burning.
Urtica dioica produces its inflammatory effect on skin (a stinging, burning sensation often called "contact urticaria") both by impaling the skin via spicules – causing mechanical irritation – and by biochemical irritants, such as histamine, serotonin, and acetylcholine, among other chemicals.
Often, the nose, cheeks, forehead, and chin are most involved. [3] A red, enlarged nose may occur in severe disease, a condition known as rhinophyma. [3] The cause of rosacea is unknown. [2] Risk factors are believed to include a family history of the condition. [3]
The major symptoms of ENS include a sensation of suffocation, nasal dryness, nasal burning, nasal crusting, and an impaired sense of airflow through the nose in patients who have had surgery or injury to nasal turbinates. [13] ENS can greatly reduce a patient's quality of life and many patients struggle to complete activities of daily living.
A stinging and burning sensation with rash is often felt and noticed, but itching is less common. [7] Often the rash is steroid responsive, initially improving with application of topical steroid. [1] The redness caused by perioral dermatitis has been associated with variable level of depression and anxiety. [10]