Analgia (from the Greek. negative consoles'an and algos - pain) - congenital absence of pain sensitivity. Along with analgia there are cases of congenital reduction of pain sensitivity - yalgia. With age (2-12 years) system of pain sensitivity gradually begins to function normally. Described, however, cases when analgia or yalgia saved and adults. Usually the clinical symptomatology of analgesia is revealed for the first time after the teething: children my tongue, lips, cheeks, and because it is not accompanied by pain, it is repeated many times, as evidenced by bleeding, scarring on the mucous membrane of the oral cavity. Frequent burns and mechanical injury to the body. Affected areas can be easily infected, pyogenic granulomas. About the frequency of damage by analgesia can be seen from the numerous scars on the skin and mucous membranes of the patient. Brittle bones, aseptic necrosis, osteomyelitis, gum abscesses, early loss of milk and permanent teeth are very frequent in the analgesia. From the nervous system usually no pathology is found. Other types of sensitivity (with a few exceptions) do not represent deviations from the norm. The etiology and pathogenesis not been studied. There is an opinion that the erased form yalgia is far more common than it is accepted to think.
With diagnosis children Suffering from analgia, should be particularly protected from all sorts of injuries.