Allodynia is the appearance of pain when exposed to stimuli that normally do not cause pain. It is noted in causalgia, neuropathies and polyneuropathies, herpes zoster, multiple sclerosis, migraine, condition after spinal cord injuries, strokes, spinal operations. To establish the cause of allodynia, data from a survey, general and neurological examination, electrophysiological, neuroimaging and laboratory studies are used. Treatment - analgesics, blockade with anesthetics, vitamins, antidepressants, physiotherapy techniques. Surgery is sometimes recommended.
Dysesthesia is an abnormal sensation of pain, itching, burning, or other discomfort that occurs spontaneously or under the influence of stimuli. It is observed in neuropathies, polyneuropathies, fibromyalgia, radicular syndrome, transverse myelitis, and some other diseases. The cause of occurrence is established on the basis of complaints, medical history, data from electrophysiological, imaging and laboratory methods. Treatment - NSAIDs, antibacterial agents, neurometabolites, physiotherapy. Some patients require surgery.