Pediatrics (also spelled paediatrics or pædiatrics) is the branch of medicine that deals with the medical care of infants, children, and adolescents, and the age limit usually ranges from birth up to 18-21 years of age (in some places until completion of secondary education). A medical practitioner who specializes in this area is known as a pediatrician, or paediatrician. The word pediatrics and its cognates mean "healer of children"; they derive from two Greek words: pa?? (pais "child") and ?at??? (iatros "doctor, healer"). Pediatricians work both in hospitals, particularly those working in its specialized subfields such as neonatology, and as primary care physicians.
A paediatrician is a childs physician who provides not only medical care for children who are acutely or chronically ill but also preventive health services for healthy children. A paediatrician manages physical, mental, and emotional well-being of the children under their care at every stage of development, in both sickness and health.