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Scalp dysesthesia is a cutaneous condition characterised by pain and burning sensations without objective physical examination findings. [ 1 ] : 64 The pain sometimes is described as burning. Often there is an underlying psychosomatic cause, such as stress, depression or anxiety.
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.
Common qualities include burning or coldness, "pins and needles" sensations, numbness and itching. [3] Up to 7–8% of the European population is affected by neuropathic pain, [4] and in 5% of persons it may be severe. [5] [6] The pain may result from disorders of the peripheral nervous system or the central nervous system (brain and spinal ...
An example is the somatosensory map which is a projection of the skin's surface in the brain that arranges the processing of tactile sensation. This type of somatotopic map is the most common, possibly because it allows for physically neighboring areas of the brain to react to physically similar stimuli in the periphery or because it allows for ...
The pain is usually constant, described as aching or burning, and often affects both sides of the face (this is almost never the case in patients with trigeminal neuralgia). The pain frequently involves areas of the head, face, and neck that are outside the sensory territories that are supplied by the trigeminal nerve.
In these instances there is also a more prolonged lower severity background pain that can be present for over 50% of the time and is described more as a burning or prickling, rather than a shock. Trigeminal pain can also occur after an attack of herpes zoster. Post-herpetic neuralgia has the same manifestations as in other parts of the body.
In neurology, Lhermitte phenomenon, also called the barber chair phenomenon, is an uncomfortable "electrical" sensation that runs down the back and into the limbs. The sensation can feel like it goes up or down the spine. It is painful for some, although others might simply feel strange sensations. [1] In many people, it is elicited by bending ...
It is frequently co-morbid with atlanto-axial joint instability, Chiari malformation, [3] or tethered spinal cord syndrome. The condition can be brought on by physical trauma , including whiplash , laxity of the ligaments surrounding the joint, or other damage to the surrounding connective tissue.