Pediatrics is a branch of medicine that deals with the medical care of infants, children and adolescents.

Pediatric emergencies
Asthma and allergies
Congenital heart diseases
Assessment of behavioral problems and development delays
Evaluation of mental retardation, down syndrome
Congenital anomalies, evaluation and treatment
Hereditary and metabolic disorders
Genetic disorders, genetic counseling
Growth and development
Immunization
Epilepsy, neurological problems
Surgical problems in babies and children
Infections and infectious diseases

Down syndrome is a genetic disorder that causes lifelong mental retardation, developmental delays and other problems. Down syndrome varies in severity, so developmental problems range from moderate to serious. Down syndrome is the most common genetic cause of learning disabilities in children.

Children with Down syndrome have a distinct facial appearance. Though not all children with Down syndrome have the same features, some of the more common features are:

Flattened facial features
Small head
Short neck
Protruding tongue
Upward slanting eyes, unusual for the child's ethnic group
Unusually shaped ears

Children with Down syndrome may also have:

Poor muscle tone
Broad, short hands with a single crease in the palm
Relatively short fingers
Excessive flexibility

Infants with Down syndrome may be of average size, but typically they grow slowly and remain shorter than the other children of a similar age.

The signs and symptoms of chickenpox are:

A red, itchy rash, initially resembling insect bites, on your face, scalp, chest and back
Small, liquid-filled blisters that break open and crust over
Fever
Abdominal pain or loss of appetite
Mild headache
Uneasiness and discomfort (malaise) or irritability
A dry cough