- H. Pylori Infections see Helicobacter Pylori Infections
- H1N1 Flu (Swine Flu)
- Haemophilus Infections
- Hair Loss
- Hair Problems
- Hair Pulling see Self-Harm
- Hairy Cell Leukemia see Leukemia
- Halitosis see Bad Breath
- Hallucinogens see Club Drugs; Drug Use and Addiction
- Hammer Toe see Toe Injuries and Disorders
- Hand Injuries and Disorders
- Hand, Foot, and Mouth Disease see Viral Infections
- Handwashing see Germs and Hygiene
- Hansen's Disease see Mycobacterial Infections
- Hantavirus Infections
- Hardening of the Arteries see Atherosclerosis
- Hashimoto's Disease see Hypothyroidism
- Hay Fever
- HDL: The "Good" Cholesterol
- Head and Neck Cancer
- Head Injuries
- Head Lice
- Headache
- Health Checkup
- Health Disparities
- Health Equity see Health Disparities
- Health Facilities
- Health Fraud
- Health Insurance
- Health Literacy
- Health Maintenance Organizations see Managed Care
- Health Occupations
- Health Problems in Pregnancy
- Health Risks of an Inactive Lifestyle
- Health Screening
- Health Statistics
- Healthcare-Associated Infections see Infection Control
- Healthy Aging
- Healthy Eating see Nutrition
- Healthy Living
- Healthy Sleep
- Hearing Aids
- Hearing Disorders and Deafness
- Hearing Problems in Children
- Heart Attack
- Heart Defects see Congenital Heart Defects
- Heart Disease in Women
- Heart Disease Prevention see How to Prevent Heart Disease
- Heart Diseases
- Heart Diseases, Congenital see Congenital Heart Defects
- Heart Diseases--Rehabilitation see Cardiac Rehabilitation
- Heart Failure
- Heart Health Tests
- Heart Murmur see Congenital Heart Defects; Heart Valve Diseases
- Heart Rate see Vital Signs
- Heart Surgery
- Heart Test see Heart Health Tests
- Heart Transplantation
- Heart Valve Diseases
- Heartburn
- Heat Exhaustion see Heat Illness
- Heat Illness
- Heel Injuries and Disorders
- Heimlich Maneuver see Choking
- Helicobacter Pylori Infections
- Hemangioma see Benign Tumors; Birthmarks; Vascular Diseases
- Hematologic Disorders see Blood Disorders
- Hematoma see Bleeding
- Hematuria see Urinalysis
- Hemiplegia see Paralysis
- Hemochromatosis
- Hemodialysis see Dialysis
- Hemoglobin A1c see A1C
- Hemoglobin SS Disease see Sickle Cell Disease
- Hemolytic Disease of Newborn see Rh Incompatibility
- Hemophilia
- Hemorrhage see Bleeding
- Hemorrhagic Fevers
- Hemorrhagic Stroke
- Hemorrhoids
- Hepatic Diseases see Liver Diseases
- Hepatic Transplantation see Liver Transplantation
- Hepatitis
- Hepatitis A
- Hepatitis B
- Hepatitis C
- Hepatoblastoma see Liver Cancer
- Hepatocellular Carcinoma see Liver Cancer
- Hepatolenticular Degeneration see Wilson Disease
- Herbal Medicine
- Herbicides see Pesticides
- Hernia
- Herniated Disk
- Heroin
- Herpes Genitalis see Genital Herpes
- Herpes Simplex
- Herpes Zoster see Shingles
- Herpes, Oral see Cold Sores
- Hiatal Hernia
- Hib see Haemophilus Infections
- Hiccups
- Hidradenitis Suppurativa
- High Blood Glucose see Hyperglycemia
- High Blood Pressure
- High Blood Pressure in Pregnancy
- High Blood Pressure Medicines see Blood Pressure Medicines
- High Blood Pressure Prevention see How to Prevent High Blood Pressure
- High Blood Sugar see Hyperglycemia
- High Cholesterol in Children and Teens
- High Risk Pregnancy see Health Problems in Pregnancy
- Hip Injuries and Disorders
- Hip Replacement
- HIPAA see Health Insurance; Personal Health Records
- Histoplasmosis
- HIV
- HIV and Infections
- HIV and Pregnancy
- HIV in Women
- HIV Medicines
- HIV--Living With see Living with HIV
- HIV: PrEP and PEP
- Hives
- HMO see Managed Care
- Hoarding see Obsessive-Compulsive Disorder
- Hodgkin Lymphoma
- Home Care Services
- Homelessness and Health
- Homeopathy see Complementary and Integrative Medicine
- Homosexuality see LGBTQIA+ Health
- Hormone Replacement Therapy
- Hormones
- Horner Syndrome see Autonomic Nervous System Disorders
- Hospice Care
- Hospital-Acquired Infections see Occupational Health for Health Care Providers
- Hospitals see Health Facilities
- Hot (Temperature) see Fever; Heat Illness
- Hot Flashes see Menopause
- Household Products
- How Much Exercise Do I Need?
- How to Improve Mental Health
- How to Lower Cholesterol
- How to Lower Cholesterol with Diet
- How to Prevent Diabetes
- How to Prevent Heart Disease
- How to Prevent High Blood Pressure
- HPV
- HPV Vaccine see HPV
- HRT see Hormone Replacement Therapy
- Huffing see Inhalants
- Human Genome Project see Genes and Gene Therapy
- Human Immunodeficiency Virus see HIV
- Human Papillomavirus see HPV
- Huntington's Disease
- Hurricanes
- Hydrocephalus
- Hydrophobia see Rabies
- Hyperactivity see Attention Deficit Hyperactivity Disorder
- Hyperbaric Oxygen see Oxygen Therapy
- Hypercalcemia see Calcium
- Hypercholesterolemia see Cholesterol; Cholesterol Levels: What You Need to Know
- Hypereosinophilic Syndrome see Eosinophilic Disorders
- Hyperglycemia
- Hyperhidrosis see Sweat
- Hyperkalemia see Potassium
- Hyperlipidemia see Cholesterol; Cholesterol Levels: What You Need to Know; Triglycerides
- Hypermobility Syndrome see Ehlers-Danlos Syndrome
- Hypernephroma see Kidney Cancer
- Hyperopia see Refractive Errors
- Hyperparathyroidism see Parathyroid Disorders
- Hyperpigmentation see Skin Pigmentation Disorders
- Hypersensitivity see Allergy
- Hypertension see High Blood Pressure
- Hypertension, Pulmonary see Pulmonary Hypertension
- Hyperthyroidism
- Hypertriglyceridemia see Triglycerides
- Hypertrophic Scar see Scars
- Hyperuricemia see Gout
- Hypocalcemia see Calcium
- Hypoglycemia
- Hypoglycemic Medicines see Diabetes Medicines
- Hypokalemia see Potassium
- Hyponatremia see Sodium
- Hypoparathyroidism see Parathyroid Disorders
- Hypopharyngeal Cancer see Throat Cancer
- Hypopigmentation see Skin Pigmentation Disorders
- Hypotension see Low Blood Pressure
- Hypothermia
- Hypothyroidism
- Hysterectomy
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