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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.
Paresthesias of the hands, feet, legs, and arms are common transient symptoms. The briefest electric shock type of paresthesia can be caused by tweaking the ulnar nerve near the elbow; this phenomenon is colloquially known as bumping one's "funny bone". Similar brief shocks can be experienced when any other nerve is tweaked (e.g. a pinched neck ...
Pallesthesia (\ˌpal-es-ˈthē-zh(ē-)ə\), or vibratory sensation, is the ability to perceive vibration. [1] [2] This sensation, often conducted through skin and bone, is usually generated by mechanoreceptors such as Pacinian corpuscles, Merkel disk receptors, and tactile corpuscles. [1]
The symptom intensity can be mild to severe in a way that limits function due to pain. [5] Activity and position can affect the symptoms. For example, symptoms may be exacerbated by standing or prolonged hip extension, with relief when sitting or flexing the hip. [4] [3] Sometimes strenuous exercise may exacerbate symptoms. [7] [5]
Some of the symptoms are: Pain and tingling in and around ankles and sometimes the toes; Swelling of the feet and ankle area. Painful burning, tingling, or numb sensations in the lower legs. Pain worsens and spreads after standing for long periods; pain is worse with activity and is relieved by rest. Electric shock sensations
The burning heat is usually limited to the soles of the feet, but may extend up to the ankles or lower legs of some patients. The burning can sometimes be accompanied by feelings of 'pins and needles' or tingling in these regions. Nighttime is when almost all people with this syndrome report the heat symptoms being the worst, with the condition ...
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The painful point can be felt as a nodule or band in the muscle, and a twitch response can be elicited on stimulation of the trigger point. Palpation of the trigger point reproduces the patient's complaint of pain, and the pain radiates in a distribution of the muscle and/or nerve.