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Find the resources you need to make informed decisions and improve your health by searching our health library. You'll find up-to-date and evidenced-based information with easy-to-understand explanations of medical conditions, symptoms, tests, and treatments for thousands of topics.

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Health Topics A-Z

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Health Topics A-Z

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AB

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Abdominal Aortic Aneurysm Screening
Abdominal Aortic Aneurysm: Should I Get a Screening Test? Decision Point
Abdominal Fullness or Bloating
Abdominal Gas and Colic
Abdominal Pain and Other Illness
Abdominal Pain Causes
Abdominal Pain Following an Injury
Abdominal Pain, Age 11 and Younger Symptom
Abdominal Pain, Age 12 and Older Symptom
Abdominal Ultrasound Medical Test
Abdominal X-Ray Medical Test
Abnormal Pap Test
Abnormal Pap Test While Pregnant
Abnormal Uterine Bleeding
Abnormal Uterine Bleeding: Should I Have a Hysterectomy? Decision Point
Abnormal Vaginal Bleeding Symptom
Abortion
Abortion: Emotional Recovery
Abscessed Tooth
Absence Epilepsy
Absorbent Products for Urinary Incontinence
Abuse in Vulnerable Adults
Abuse: Signs of Abuse-Related Injuries

AC

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AD

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Added Sugars
Addison's Disease
Adenomyosis
ADHD and Hyperactivity
ADHD in Adults: Behavioral Strategies
ADHD Myths and Facts
ADHD: Helping Your Child Get the Most From School Actionset
ADHD: Helping Your Child Get Things Done Actionset
ADHD: Impulsivity and Inattention
ADHD: Should My Child Take Medicine for ADHD? Decision Point
ADHD: Social Skills Training
ADHD: Symptoms in Adults
ADHD: Taking Care of Yourself When Your Child Has ADHD
ADHD: Tests for Other Disorders
Adjustable Gastric Banding Surgery Surgery Overview
Adjustment to Cancer: Anxiety and Distress (PDQ®): Supportive care - Health Professional Information [NCI] National Cancer Institute
Adjustment to Cancer: Anxiety and Distress (PDQ®): Supportive care - Patient Information [NCI] National Cancer Institute
Adolescent Sensory and Motor Development
Adrenocortical Carcinoma Treatment (PDQ®): Treatment - Health Professional Information [NCI] National Cancer Institute
Adrenocortical Carcinoma Treatment (PDQ®): Treatment - Patient Information [NCI] National Cancer Institute
Adrenocorticotropic Hormone Medical Test
Adult Acute Lymphoblastic Leukemia Treatment (PDQ®): Treatment - Health Professional Information [NCI] National Cancer Institute
Adult Acute Lymphoblastic Leukemia Treatment (PDQ®): Treatment - Patient Information [NCI] National Cancer Institute
Adult Acute Myeloid Leukemia Treatment (PDQ®): Treatment - Health Professional Information [NCI] National Cancer Institute
Adult Acute Myeloid Leukemia Treatment (PDQ®): Treatment - Patient Information [NCI] National Cancer Institute
Adult Central Nervous System Tumors Treatment (PDQ®): Treatment - Health Professional Information [NCI] National Cancer Institute
Adult Central Nervous System Tumors Treatment (PDQ®): Treatment - Patient Information [NCI] National Cancer Institute
Adult Hodgkin Lymphoma Treatment (PDQ®): Treatment - Health Professional Information [NCI] National Cancer Institute
Adult Hodgkin Lymphoma Treatment (PDQ®): Treatment - Patient Information [NCI] National Cancer Institute
Adult Immunization Schedule
Adult Non-Hodgkin Lymphoma Treatment (PDQ®): Treatment - Health Professional Information [NCI] National Cancer Institute
Adult Non-Hodgkin Lymphoma Treatment (PDQ®): Treatment - Patient Information [NCI] National Cancer Institute
Adult Primary Liver Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI] National Cancer Institute
Adult Primary Liver Cancer Treatment (PDQ®): Treatment - Patient Information [NCI] National Cancer Institute
Adult Soft Tissue Sarcoma Treatment (PDQ®): Treatment - Health Professional Information [NCI] National Cancer Institute
Adult Soft Tissue Sarcoma Treatment (PDQ®): Treatment - Patient Information [NCI] National Cancer Institute
Advance Care Planning Learning Center
Advance Care Planning: Should I Have Artificial Hydration and Nutrition? Decision Point
Advance Care Planning: Should I Receive CPR and Life Support? Decision Point
Advance Care Planning: Should I Stop Kidney Dialysis? Decision Point
Advance Care Planning: Should I Stop Treatment That Prolongs My Life? Decision Point
Advance Directive: What to Include

AF

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AG

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AI

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AIDS-Related Lymphoma Treatment (PDQ®): Treatment - Health Professional Information [NCI] National Cancer Institute
AIDS-Related Lymphoma Treatment (PDQ®): Treatment - Patient Information [NCI] National Cancer Institute

AL

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Alan's Story: Coping With Change After a Heart Attack
Alanine Aminotransferase (ALT) Medical Test
Albumin Urine Test Medical Test
Alcohol and Drug Use Symptom
Alcohol and Drugs: When to Get Help for an Intoxicated Person
Alcohol and Substance Use in PTSD
Alcohol Effects on a Fetus
Alcohol Increases the Risk of Cold Injury
Alcohol or Drug Use During Pregnancy
Alcohol Problems: Helping Someone Get Treatment Actionset
Alcohol Problems: How to Stop Drinking Actionset
Alcohol Use Disorder
Alcohol Withdrawal
Alcoholic Cardiomyopathy
Aldosterone in Blood Medical Test
Aldosterone in Urine Medical Test
Alkali Burns
Alkaline Phosphatase Medical Test
Allen Test
Allergic Reaction Symptom
Allergic Reaction to Tattoo Dye
Allergic Rhinitis
Allergies Learning Center
Allergies in Children: Giving an Epinephrine Shot to a Child Actionset
Allergies to Insect Stings
Allergies: Avoiding Indoor Triggers Actionset
Allergies: Avoiding Outdoor Triggers Actionset
Allergies: Giving Yourself an Epinephrine Shot Actionset
Allergies: Rush Immunotherapy
Allergies: Should I Take Allergy Shots? Decision Point
Allergies: Should I Take Shots for Insect Sting Allergies? Decision Point
Allergy Shots for Allergic Rhinitis
Allergy Shots for Asthma
Allergy Tests Medical Test
Allergy to Natural Rubber (Latex)
Allogeneic Stem Cell Transplant
Alopecia Areata
Alpha-1 Antitrypsin Deficiency Genetic Testing
Alpha-Fetoprotein (AFP) in Blood Medical Test
Altitude Sickness
Alzheimer's and Other Dementias: Coping With Sundowning
Alzheimer's and Other Dementias: Maintaining Good Nutrition
Alzheimer's and Other Dementias: Making the Most of Remaining Abilities
Alzheimer's Disease
Alzheimer's Disease: Should I Take Medicines? Decision Point
Alzheimer's or Other Dementia: Should I Move My Relative Into Long-Term Care? Decision Point

AM

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Amblyopia
Amblyopia: Wearing an Eye Patch Actionset
Ambulatory Electrocardiogram Medical Test
American Heart Association Healthy Diet Guidelines
American Urological Association Symptom Index
Ammonia Medical Test
Amniocentesis Medical Test
Amylase Medical Test
Amyotrophic Lateral Sclerosis (ALS)

AN

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Anabolic Steroids
Anal Cancer
Anal Cancer Prevention (PDQ®): Prevention - Health Professional Information [NCI] National Cancer Institute
Anal Cancer Prevention (PDQ®): Prevention - Patient Information [NCI] National Cancer Institute
Anal Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI] National Cancer Institute
Anal Cancer Treatment (PDQ®): Treatment - Patient Information [NCI] National Cancer Institute
Anal Fissure
Anal Fistulas and Crohn's Disease
Androgenetic Alopecia (Hair Loss, Inherited), Deciding about Treatment Decision Point
Andy's Story: Finding Your Own Routine When You Have Diabetes
Anemia
Anemia During Pregnancy
Anemia of Chronic Disease (ACD)
Anemia of Chronic Kidney Disease
Anesthesia
Anesthesia: Health Risks
Anger, Hostility, and Violent Behavior Symptom
Angina
Angina (Stable), Deciding About Angioplasty Decision Point
Angiogram Medical Test
Angiogram for Coronary Artery Disease, Deciding About Decision Point
Angiogram of the Head and Neck Medical Test
Angiogram of the Lung Medical Test
Angioplasty for Coronary Artery Disease
Angioplasty for Peripheral Arterial Disease of the Legs
Angioplasty for Stable Angina, Deciding About Decision Point
Angiotensin II receptor blockers (ARBs)
Angiotensin-converting enzyme (ACE) inhibitors
Animal and Human Bites Symptom
Animal and Human Bites: When Stitches Are Needed
Ankle Sprain
Ankle-Brachial Index Test
Ankylosing Spondylitis
Anorexia Nervosa
Anorexia: Learning New Eating Behaviors
Anorexia: Learning to Trust Others
Anosmia
Anterior Cruciate Ligament (ACL) Injuries
Anterior Cruciate Ligament (ACL) Injury, Deciding About Surgery Decision Point
Anterior Cruciate Ligament (ACL) Surgery Surgery Overview
Anthrax
Antibiotic Sensitivity Test
Antibiotics
Antibiotics for an Ear Infection, Deciding About Decision Point
Antibody Tests for Lupus
Anticoagulants
Antidepressant Withdrawal
Antidepressants
Antidepressants; Should I Stop Taking? Decision Point
Antidepressants; Should I Take Them when I am Pregnant? Decision Point
Antidepressants; Should I Take Them? Decision Point
Antigen Tests for Giardiasis
Antihistamines
Antihistamines for Morning Sickness
Antihypertensive Medications, Deciding About Decision Point
Antineoplastons (PDQ®): Integrative, alternative, and complementary therapies - Health Professional Information [NCI] National Cancer Institute
Antineoplastons (PDQ®): Integrative, alternative, and complementary therapies - Patient Information [NCI] National Cancer Institute
Antinuclear Antibodies (ANA) Medical Test
Antioxidants
Antiphospholipid Syndrome and Pregnancy
Antiplatelets
Antipsychotic medicines
Antiretroviral medicines for HIV
Antisperm Antibody Test Medical Test
Antithyroid Antibody Tests Medical Test
Antithyroid Medication or Radioactive Iodine for Hyperthyroidism, Deciding About Decision Point
Antiviral Medicines for Flu, Deciding About Taking Decision Point
Antiviral Therapy for Chronic Hepatitis B, Deciding About Decision Point
Anxiety Symptom
Anxiety: Stop Negative Thoughts Actionset

AO

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Aortic Aneurysm
Aortic Dissection
Aortic Valve Regurgitation
Aortic Valve Regurgitation: Deciding About Surgery
Aortic Valve Replacement Surgery Surgery Overview
Aortic Valve Stenosis
Aortobifemoral Bypass for Peripheral Arterial Disease Surgery Overview

AP

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AR

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Arm Injuries Symptom
Arm Problems, Noninjury Symptom
Arnica
Aromatherapy (Essential Oils Therapy)
Aromatherapy With Essential Oils (PDQ®): Integrative, alternative, and complementary therapies - Health Professional Information [NCI] National Cancer Institute
Aromatherapy With Essential Oils (PDQ®): Integrative, alternative, and complementary therapies - Patient Information [NCI] National Cancer Institute
Arrhythmias and Sexual Activity
Arterial Blood Gases Medical Test
Arthritis: Managing Rheumatoid Arthritis Actionset
Arthritis: Shots for Knee Pain
Arthritis: Should I Have Hip Replacement Surgery? Decision Point
Arthritis: Should I Have Knee Replacement Surgery? Decision Point
Arthritis: Should I Have Shoulder Replacement Surgery? Decision Point
Arthrogram (Joint X-Ray) Medical Test
Arthroplasty for Rheumatoid Arthritis Surgery Overview
Arthroscopy Medical Test
Arthroscopy for Rheumatoid Arthritis Surgery Overview
Arthroscopy for Temporomandibular Disorders Surgery Overview
Artificial Nails: Problems and Treatment
Artificial Sphincter for Urinary Incontinence in Men Surgery Overview
Arturo's Story: Getting Support for Making a Change

AS

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AT

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At-Home Genetic Tests
Atherosclerosis
Athlete's Foot
Atopic Dermatitis (Eczema)
Atopic Dermatitis: Taking Care of Your Skin Actionset
Atrial Fibrillation
Atrial Fibrillation and Daily Life
Atrial Fibrillation: Should I Have Catheter Ablation? Decision Point
Atrial Fibrillation: Should I Take an Anticoagulant to Prevent Stroke? Decision Point
Atrial Fibrillation: Should I Try Electrical Cardioversion? Decision Point
Atrial Fibrillation: Which Anticoagulant Should I Take To Prevent Stroke? Decision Point
Attention Deficit Hyperactivity Disorder (ADHD)
Attention Deficit Hyperactivity Disorder, Should My Child Take Medicine for Decision Point

AU

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Aura and Seizures
Autism and Vaccines
Autism Spectrum Disorder (ASD)
Autism: Behavioral Training and Management
Autism: Support and Training for the Family
Autoimmune Disease Tests Medical Test
Autologous Stem Cell Transplant
Automated Ambulatory Blood Pressure Monitoring
Autopsy Medical Test
Autopsy: Should I Have an Autopsy Done on My Loved One? Decision Point

AV

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AY

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Ayurveda