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Children and Teenagers
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Children Teenagers

Children and Teenagers

This index provides a comprehensive overview of health topics, developmental milestones, and medical conditions affecting children and adolescents.

Health Topics Index

  • Acute Flaccid Myelitis
  • Adenoids
  • Asthma in Children
  • Attention Deficit Hyperactivity Disorder
  • Autism Spectrum Disorder
  • Baby Health Checkup
  • Birth Weight
  • Bullying and Cyberbullying
  • Cancer in Children
  • Chickenpox
  • Child Abuse
  • Child Behavior Disorders
  • Child Dental Health
  • Child Development
  • Child Mental Health
  • Child Nutrition
  • Child Safety
  • Child Sexual Abuse
  • Childbirth Problems
  • Childhood Brain Tumors
  • Childhood Leukemia
  • Childhood Vaccines
  • Children's Health
  • Circumcision
  • College Health
  • Common Infant and Newborn Problems
  • Croup
  • Developmental Disabilities
  • Diabetes in Children and Teens
  • Diabetes Type 1
  • Drugs and Young People
  • Ear Infections
  • Exercise for Children
  • Fifth Disease
  • Growth Disorders
  • Head Lice
  • Hearing Problems in Children
  • High Cholesterol in Children and Teens
  • Infant and Newborn Care
  • Infant and Newborn Development
  • Infant and Newborn Nutrition
  • Juvenile Arthritis
  • Lead Poisoning
  • Learning Disabilities
  • Measles
  • Medicines and Children
  • Mumps
  • Newborn Screening
  • Obesity in Children
  • Parenting
  • Piercing and Tattoos
  • Pinworms
  • Premature Babies
  • Puberty
  • Reflux in Children
  • Reflux in Infants
  • Respiratory Syncytial Virus Infections
  • Rubella
  • School Health
  • Smoking and Youth
  • Speech and Language Problems in Children
  • Sudden Infant Death Syndrome
  • Teen Depression
  • Teen Development
  • Teen Health
  • Teen Mental Health
  • Teen Sexual Health
  • Teen Violence
  • Teenage Pregnancy
  • Toddler Development
  • Toddler Health
  • Toddler Nutrition
  • Tonsillitis
  • Twins, Triplets, Multiple Births
  • Uncommon Infant and Newborn Problems
  • Underage Drinking
  • Whooping Cough

Frequently Asked Questions

The first series of vaccines typically begins at birth and continues through the first year of life, following the national immunization schedule (e.g., Hepatitis B at birth, DTaP, Hib, IPV, PCV, and Rotavirus at 2 months). Parents should discuss any concerns with their pediatrician, who can explain the evidence supporting vaccine safety, address specific questions, and provide resources such as the CDC’s Vaccine Information Statements.
Parents should watch for persistent patterns of inattention, such as difficulty staying on task, frequent daydreaming, or losing items; hyperactivity, like constant fidgeting, running in inappropriate situations, or difficulty staying seated; and impulsivity, such as interrupting conversations, making hasty decisions, or acting without considering consequences. If these behaviors are present in multiple settings (home, school) and interfere with functioning, a pediatrician or child psychologist should evaluate the child for ADHD.
Set realistic, age-appropriate goals and incorporate a mix of structured sports, free play, and family walks. Ensure proper warm‑up and cool‑down routines, use appropriate equipment, and teach safe techniques (e.g., proper throwing mechanics). Encourage hydration, balanced nutrition, and rest, and monitor for signs of overuse such as persistent soreness or fatigue.
Focus on portion control, increase fruit and vegetable servings, limit sugary drinks, and choose whole grains over refined ones. Encourage family meals with minimal distractions, involve children in meal planning and cooking, and promote regular physical activity. Setting a consistent bedtime and limiting screen time also help regulate appetite and energy balance.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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