Analgia is congenital absence of pain sensitivity. Sharp congenital reduce pain sensitivity - yalgia. The etiology and pathogenesis of analgin unknown. If analgay observed changes on the part of the skeleton (frequent fractures, aseptic necrosis, osteomyelitis), and early loss of both milk and permanent teeth. Is analgia very early. With teething children begin to bite his tongue, lips, cheeks, which leads to multiple scars on the mucous membrane of the oral cavity. Scars are also observed on the skin resulting burns, mechanical injuries, and others with few exceptions analgia with age passes (some kids have to 2-5, others to 10-12 years). Effective treatments are not. Children with analgia should be protected from possible injuries.