From asthma to ulcers, learn about diseases and conditions that can affect teens. Get health information and resources for yourself or someone you care about.

Allergies, Asthma & the Immune System

• 5 Ways to Be Prepared for an Allergy Emergency
• Air Pollution and Asthma
• Allergies
• Allergy Testing
• Asthma
• Asthma Center
• Can the Weather Affect a Person's Asthma?
• Celiac Disease
• Chronic Fatigue Syndrome
• Dealing With an Asthma Flare-Up
• Do Allergies Cause Asthma?
• Eczema
• Egg Allergy
• Food Allergies
• Food Allergies and Travel
• Food Allergies: How to Cope
• Hives (Urticaria)
• How Can I Deal With My Asthma?
• Lupus
• Milk Allergy
• My Friend Has a Food Allergy. How Can I Help?
• My Girlfriend Has a Peanut Allergy. Do We Have to Worry About Kissing?
• Peanut Allergy
• Poison Ivy
• PrEP (Pre-Exposure Prophylaxis)
• Psoriasis
• Serious Allergic Reactions (Anaphylaxis)
• Shellfish Allergy
• Smoking and Asthma
• Spirometry (Video)
• Stem Cell Transplants
• Thrombocytopenia
• Tree Nut Allergy

Blood Disorders

• Anemia
• Blood Test (Video)
• Crizanlizumab for People With Sickle Cell Disease
• How Do I Find Out if I Have Sickle Cell Trait?
• Hydroxyurea for People With Sickle Cell Disease
• I Have Sickle Cell Trait: Could I Pass Sickle Cell Disease to My Children?
• I Have Sickle Cell Trait: Is It Safe to Fly or Travel to the Mountains?
• L-Glutamine for People With Sickle Cell Disease
• My Friend Has Sickle Cell Disease. How Can I Help?
• Preventive Medicines for Sickle Cell Disease: Are They Right for You?
• Sickle Cell Crisis (Pain Crisis)
• Sickle Cell Disease
• Sickle Cell Disease: Take Charge of Your Health
• Sickle Cell Trait
• Sickle Cell Trait: 5 Problems to Know About
• Stem Cell Transplants
• Thrombocytopenia
• Transitioning Your Medical Care: Sickle Cell Disease
• Voxelotor for People With Sickle Cell Disease
• What’s the Connection Between Sickle Cell Trait and Malaria?
• von Willebrand Disease

Bones, Muscles & Joints

• Achilles Tendonitis
• Ankle Sprains
• Anterior Cruciate Ligament (ACL) Tears
• Blount Disease
• Broken Bones
• Broken Collarbone (Clavicle Fracture)
• Bursitis
• Casts
• Cerebral Palsy: Ira's Story (Video)
• Comminuted Fractures
• Female Athlete Triad
• Fibromyalgia
• First Aid: Broken Bones
• Greenstick Fractures
• Groin Strain
• Hamstring Strain
• Hip Pointer
• How Broken Bones Heal
• How the Joints Work (Video)
• Juvenile Idiopathic Arthritis (JIA)
• Knee Injury: Caroline's Story
• Kyphosis
• Lupus
• Medial Collateral Ligament (MCL) Injuries
• Meniscus Tears
• Osgood-Schlatter Disease
• Osteomyelitis
• Overuse Injuries
• Patellofemoral Pain Syndrome (Runner's Knee)
• Proximal Biceps Tendonitis
• Quadriceps Contusion
• Repetitive Stress Injuries in Sports
• Scoliosis
• Scoliosis: Bracing
• Sever's Disease
• Shin Splints
• Sinding-Larsen-Johansson Syndrome
• Slipped Capital Femoral Epiphysis (SCFE)
• Spinal Fusion Surgery
• Spinal Muscular Atrophy (SMA): Steven's Story (Video)
• Splints
• Strains and Sprains
• Stress Fractures
• What Causes Muscle Twitches?
• What Happens in ACL Surgery?
• What to Expect When Your Cast Comes Off

Brain & Nervous System

• Cerebral Palsy
• Cerebral Palsy: Ira's Story (Video)
• Chronic Fatigue Syndrome
• Concussions
• Concussions Center
• Concussions: Alex's Story
• Concussions: Prevention Tips
• Epilepsy
• Fainting
• Going Back to School After a Concussion
• Headaches
• How Can I Prevent Lyme Disease?
• Lyme Disease
• Migraine Headaches
• Strokes
• Tics
• Tourette Syndrome
• What to Do After a Head Injury
• When Can Teens Go Back to Sports After a Concussion?
• Why Do People Get Depressed?
• Why Wear a Helmet If It Can't Prevent Concussions?

Cancer & Tumors

• Can I Have Children After Cancer Treatments?
• Cancer Basics
• Cancer Center
• Chemotherapy
• Dealing With Cancer
• Melanoma
• My Friend Has Cancer. How Can I Help?
• Radiation Therapy
• Side Effects of Chemotherapy and Radiation
• Stem Cell Transplants
• Steroids and Cancer Treatment
• Thrombocytopenia

Digestive System

• Celiac Disease
• Cholera
• Constipation
• Crohn's Disease
• Cystic Fibrosis
• Cystic Fibrosis: Diet and Nutrition
• Cystic Fibrosis: Sample Menu
• Gastroesophageal Reflux Disease (GERD)
• Hernias
• Indigestion
• Inflammatory Bowel Disease
• Irritable Bowel Syndrome
• Lactose Intolerance
• Stomachaches
• Ulcerative Colitis
• Ulcers
• Upper GI (Video)

Genetic, Chromosomal & Metabolic Conditions

• Albinism
• Dwarfism
• Dwarfism: Emily's Story (Video)
• Genes and Genetics
• How Do I Find Out if I Have Sickle Cell Trait?
• Hydroxyurea for People With Sickle Cell Disease
• I Have Sickle Cell Trait: Could I Pass Sickle Cell Disease to My Children?
• Klinefelter Syndrome
• L-Glutamine for People With Sickle Cell Disease
• Metabolic Syndrome
• Sickle Cell Disease: Take Charge of Your Health
• Sickle Cell Trait
• Turner Syndrome
• Voxelotor for People With Sickle Cell Disease
• What Is Hypoglycemia?
• What’s the Connection Between Sickle Cell Trait and Malaria?
• von Willebrand Disease

Growth, Hormones & Diabetes

• Chronic Fatigue Syndrome
• Diabetes Center
• Diabetes: Eating Smart
• Diabetes: When to Call the Doctor
• Dwarfism
• Growth Problems
• Handling Diabetes When You're Sick
• Managing Diabetes at School
• Sports, Exercise, and Diabetes
• Tips for Athletes With Type 1 Diabetes
• Type 1 Diabetes: How Is It Treated?
• Type 2 Diabetes: How Is It Treated?
• What Is Type 1 Diabetes?
• What Is Type 2 Diabetes?
• Your Diabetes Health Care Team

Heart & Cardiovascular System

• Arrhythmias
• Atrial Septal Defect
• Coarctation of the Aorta
• EKG (Video)
• Echocardiogram
• Hypertension (High Blood Pressure)
• Ventricular Septal Defect (VSD)

Kidneys & Urinary System

• Bedwetting (Nocturnal Enuresis)
• Blood in the Urine (Hematuria)
• Dialysis
• Glomerulonephritis
• Hemodialysis
• Kidney Disease
• Kidney Stones
• Kidney Transplant
• Peritoneal Dialysis
• Urinary Tract Infections

Learning Disorders

• ADHD
• ADHD Medicines
• ADHD: Tips to Try
• Autism Spectrum Disorder
• Therapy for ADHD
• Understanding Dyslexia

Lungs & Respiratory System

• Asthma
• Cystic Fibrosis
• Cystic Fibrosis: Diet and Nutrition
• Dietary Tips for Teens With Cystic Fibrosis
• How to Use an Incentive Spirometer
• I Have Sickle Cell Trait: Is It Safe to Fly or Travel to the Mountains?
• Incentive Spirometer
• X-Ray (Video)

Medical Tests & Procedures

• 5 Tips for Dealing With Shots
• Blood Test (Video)
• Blood Test: Magnesium
• Blood Test: Phosphorus
• CAT Scan (Video)
• EKG (Video)
• Echocardiogram
• Getting an IV (Video)
• Is It Normal to Feel Sick During a Blood Draw?
• MRI (Video)
• Spinal Fusion Surgery
• Spirometry (Video)
• Stem Cell Transplants
• Strep Test (Video)
• Upper GI (Video)
• Urine Test (Video)
• X-Ray (Video)

Mouth & Teeth Problems

• Canker Sores
• Gum Disease
• Peritonsillar Abscess
• What Are Impacted Wisdom Teeth?
• What Causes Bad Breath?

Overweight and Obesity

• 5 Facts About Goal Setting
• About Overweight and Obesity
• Acanthosis Nigricans
• Body Mass Index (BMI)
• Cholesterol
• Dealing With Feelings When You're Overweight
• Emotional Eating
• Exercise Log
• How Can I Lose Weight Safely?
• Hypertension (High Blood Pressure)
• Losing Weight: Brandon's Story (Video)
• Managing Your Weight
• Metabolic Syndrome
• Polycystic Ovary Syndrome (PCOS)
• Therapy and Weight Management
• Weight Management: Strength Training Exercises (Video)
• What Can I Do About Overeating?
• When Being Overweight Is a Health Problem
• Why Exercise Is Wise

Sexual Health & Reproductive System

• Abnormal Uterine Bleeding (AUB)
• Breast Exams
• Can Getting the HPV Vaccine Help If I Already Have Genital Warts?
• Delayed Puberty
• Endometriosis
• Female Athlete Triad
• Hernias
• How Do People Get AIDS?
• Irregular Periods
• Klinefelter Syndrome
• PMS, Cramps, and Irregular Periods
• Pelvic Exams
• Polycystic Ovary Syndrome (PCOS)
• Testicular Injuries
• Testicular Torsion
• Turner Syndrome
• Vaginal Discharge: What's Normal, What's Not
• Varicocele
• Why Do My Testicles Ache?

Sight, Speech & Hearing

• Earbuds
• Eardrum Injuries
• Hearing Aids
• How Can I Prevent Hearing Loss?
• Speech Problems
• Styes
• Visual Impairment

Skin, Hair & Nails

• Acanthosis Nigricans
• Acne
• Athlete's Foot
• Blisters, Calluses, and Corns
• Bruises
• Can Acne Scars Be Removed?
• Cellulite
• Cuts, Scratches, and Scrapes
• Dandruff
• Head Lice
• Hives (Urticaria)
• I Got Blisters From a Sunburn. What Should I Do?
• Ingrown Toenails
• Jock Itch
• Lupus
• Molluscum Contagiosum
• Pityriasis Rosea
• Psoriasis
• Ringworm
• Skin Abscesses
• Vitiligo
• What Can I Do About Acne?
• What Can I Do About the Rough Skin on My Arms?
• Wound Healing and Care

Personal Stories

• Concussions: Alex's Story
• Dwarfism: Emily's Story (Video)
• Knee Injury: Caroline's Story
• Spinal Muscular Atrophy (SMA): Steven's Story (Video)