Kids Disease Child Disease Encyclopedia

Child Disease Encyclopedia

When your child is sick, start here.

Plain-language guidance on 140 child and kids' diseases — staged symptoms, home care, prevention, and exactly when to call a doctor. Built to support your child's health, never to replace your pediatrician.

Compiled from and aligned with AAP · CDC · WHO · NHS

Disease Profiles
140
Body Systems
18
Categories
36

Featured Pediatric Profiles

Quick links to the most consulted clinical references

Severe

Pediatric Asthma

Chronic Reversible Inflammatory Airway Hyperreactivity

Toddlerhood through Adolescence (Onset typically before 5 years)

Severe

Acute Laryngotracheobronchitis (Croup)

Upper Airway Viral Subglottic Stenosis

6 Months to 3 Years (Peak occurrence)

Moderate

Acute Otitis Media (AOM)

Acute Suppurative Middle Ear Infection

6 Months to 2 Years (Peak incidence due to Eustachian tube anatomy)

Mild

Atopic Dermatitis (Infantile Eczema)

Chronic Relapsing Pruritic Inflammatory Skin Disease

Infants starting at 2 to 6 months through childhood and adolescence.

Emergency

Acute Bacterial Meningitis

Acute Suppurative Central Nervous System Infection

Neonates, Infants, and Adolescents (High risk in communal settings)

Severe

Pediatric Dehydration

Acute Fluid and Electrolyte Depletion

Infants and Young Children (High risk)

Explore Body Systems

Browse illnesses by the organ system they affect

Respiratory System 9 illnesses Cardiovascular System 8 illnesses Gastrointestinal System 10 illnesses Neurological System 5 illnesses Musculoskeletal System 8 illnesses Dermatological System 9 illnesses Hematological System 6 illnesses Endocrine & Metabolic 9 illnesses Renal & Urological 6 illnesses Ophthalmological System 5 illnesses Ear, Nose & Throat (ENT) 7 illnesses Immunological & Allergic 6 illnesses Infectious & Parasitic 14 illnesses Genetic & Chromosomal 7 illnesses Nutritional & Deficiency 5 illnesses Developmental & Behavioral 9 illnesses Oncological System 5 illnesses Neonatal (Newborns) 12 illnesses

Childhood Immunology Milestones

How the immune system develops and why vaccine timing matters

  1. 01

    Passive Shielding

    0 — 6 Months

    Maternal antibodies transfer via the placenta and breastmilk, providing immediate protection while the baby's own immune response begins to mature.

  2. 02

    Vaccine Priming

    6 — 18 Months

    Vaccination series introduce harmless targets, safely training immature B and T lymphocytes to generate highly specific antibodies and memory clones.

  3. 03

    Cellular Expansion

    18 Months — 5 Years

    Exposure to daycare and common childhood viruses builds an expansive immunological library, continuously training cellular memory networks.

  4. 04

    Mature Profile

    5 Years & Above

    Lymphoid tissue structure and antibody distribution reaches standard mature efficacy. The child's immune system now mirrors adult capability.

View the Full Vaccine Calendar

When should you actually worry?

Fever thresholds by age, ER-versus-pediatrician decisions, dehydration warning signs, vaccine safety — answered with sources from the AAP, CDC, and NHS.

Read the Parents' FAQ