title: Special focus. Pain.
abstract: This Part has explored some of the epidemiological factors that affect pain. The differences between acute and chronic pain have been discussed in terms of disease process, anatomy and physiology and associated signs and symptoms.
mesh_terms: D000208:Acute Disease; D002908:Chronic Disease; D006801:Humans; D008959:Models, Neurological; D010146:Pain / Q000145:classification / Q000453:epidemiology* / Q000209:etiology / Q000503:physiopathology*; D015995:Prevalence; D012307:Risk Factors; D006113:United Kingdom / Q000453:epidemiology