A Pediatrician is a medical doctor who specializes in the care of infants, children, and adolescents.Pediatricians are responsible for conducting regular check-ups on infants, children, and adolescents to monitor their growth and development. They may perform physical examinations, check vital signs, and ask about symptoms or concerns.Pediatricians diagnose and treat a range of illnesses and injuries that affect children. They may prescribe medication, provide medical advice, or refer patients to specialists as needed.