Diseases & Conditions
en español: Enfermedades y dolencias
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.
- 5 Ways to Be Prepared for an Allergy Emergency
- Air Pollution and Asthma
- Allergies
- Allergy Testing
- Asthma
- Asthma (Topic Center)
- Can People With Asthma Play Sports?
- Can the Weather Affect a Person's Asthma?
- Celiac Disease
- Chronic Fatigue Syndrome
- Dealing With an Asthma Flare-Up
- Dealing With Asthma Triggers
- Do Allergies Cause Asthma?
- Eczema
- Egg Allergy
- Exercise-Induced Asthma
- Food Allergies
- Food Allergies and Travel
- Food Allergies: How to Cope
- Hives (Urticaria)
- How Can I Deal With My Asthma?
- Lupus
- Milk Allergy
- My Asthma Inhaler Doesn't Help. What Can I Do?
- My Friend Has a Food Allergy. How Can I Help?
- My Partner Has a Peanut Allergy. Do We Have to Worry About Kissing?
- Peanut Allergy
- Poison Ivy
- PrEP (Pre-Exposure Prophylaxis)
- Psoriasis
- School and Asthma
- Serious Allergic Reactions (Anaphylaxis)
- Shellfish Allergy
- Smoking and Asthma
- Spirometry (Video)
- Stem Cell Transplants
- Thrombocytopenia
- Traveling and Asthma
- Tree Nut Allergy
- What's an Asthma Action Plan?
- Anemia
- Blood Test (Video)
- Could My Kids Be Born With Sickle Cell Disease Someday?
- Crizanlizumab for People With Sickle Cell Disease
- How Do I Find Out if I Have Sickle Cell Trait?
- How to Support Someone With Sickle Cell Disease
- Hydroxyurea for People With Sickle Cell Disease
- I Have Sickle Cell Trait: Is It Safe to Fly or Travel to the Mountains?
- L-Glutamine for People With Sickle Cell Disease
- Preventive Medicines for Sickle Cell Disease: Are They Right for You?
- Sickle Cell Crisis (Pain Crisis)
- Sickle Cell Disease
- Sickle Cell Disease (Topic Center)
- Sickle Cell Disease Treatment (Topic Center)
- Sickle Cell Disease: Take Charge of Your Health
- Sickle Cell Trait
- Sickle Cell Trait (Topic Center)
- Sickle Cell Trait: 5 Problems to Know About
- Stem Cell Transplants
- Thrombocytopenia
- Transitioning Your Medical Care: Sickle Cell Disease
- Von Willebrand Disease
- Voxelotor for People With Sickle Cell Disease
- What’s the Connection Between Sickle Cell Trait and Malaria?
- Achilles Tendonitis
- Ankle Sprains
- Anterior Cruciate Ligament (ACL) Tears
- 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 Do 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
- Cerebral Palsy
- Cerebral Palsy: Ira's Story (Video)
- Chronic Fatigue Syndrome
- Concussions
- Concussions (Topic 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?
- Can I Have Children After Cancer Treatments?
- Cancer (Topic Center)
- Cancer Basics
- 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
- 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)
- Albinism
- Could My Kids Be Born With Sickle Cell Disease Someday?
- 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
- Klinefelter Syndrome
- L-Glutamine for People With Sickle Cell Disease
- Metabolic Syndrome
- Sickle Cell Disease (Topic Center)
- Sickle Cell Disease Treatment (Topic Center)
- Sickle Cell Disease: Take Charge of Your Health
- Sickle Cell Trait
- Sickle Cell Trait (Topic Center)
- Turner Syndrome
- Von Willebrand Disease
- Voxelotor for People With Sickle Cell Disease
- What Is Hypoglycemia?
- What’s the Connection Between Sickle Cell Trait and Malaria?
- Chronic Fatigue Syndrome
- Diabetes (Topic Center)
- Diabetes: Eating Smart
- Dwarfism
- Growth Problems
- Handling Diabetes When You're Sick
- Managing Blood Sugars When You Have Type 1 Diabetes
- Medicines for Diabetes
- Sports, Exercise, and Diabetes
- Tips for Athletes With Type 1 Diabetes
- What Is Type 1 Diabetes?
- What Is Type 2 Diabetes?
- Your Diabetes Health Care Team
- Bedwetting (Nocturnal Enuresis)
- Blood in the Urine (Hematuria)
- Dialysis
- Glomerulonephritis
- Hemodialysis
- Kidney Disease
- Kidney Stones
- Kidney Transplant
- Peritoneal Dialysis
- Urinary Tract Infections
- ADHD
- ADHD Medicines
- ADHD: Tips to Try
- Autism Spectrum Disorder
- Therapy for ADHD
- Understanding Dyslexia
- 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)
- 5 Tips for Dealing With Shots
- Blood Test (Video)
- CAT Scan (Video)
- Echocardiogram
- EKG (Video)
- 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)
- Canker Sores
- Gum Disease
- Peritonsillar Abscess
- What Are Impacted Wisdom Teeth?
- What Causes Bad Breath?
- 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
- Gastric Sleeve Surgery
- How Can I Lose Weight Safely?
- Hypertension (High Blood Pressure)
- Losing Weight: Brandon's Story (Video)
- Managing Your Weight (Topic Center)
- Metabolic Syndrome
- Polycystic Ovary Syndrome (PCOS)
- Therapy and Weight Management
- Weight Loss Surgery
- Weight Management: Strength Training Exercises (Video)
- What Can I Do About Overeating?
- When Being Overweight Is a Health Problem
- Why Exercise Is Wise
- 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
- Is My Vaginal Discharge Normal?
- Klinefelter Syndrome
- Pelvic Exams
- PMS, Cramps, and Irregular Periods
- Polycystic Ovary Syndrome (PCOS)
- Testicular Injuries
- Testicular Torsion
- Turner Syndrome
- Varicocele
- Why Do My Testicles Ache?
- Earbuds
- Eardrum Injuries
- Hearing Aids
- How Can I Prevent Hearing Loss?
- Speech Problems
- Styes
- Visual Impairment
- 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