• H1N1 Flu (Swine Flu)

• Hair Loss - See Alopecia

• Hair Pulling (Trichotillomania)

• Hand Contractures - See Contractures of the Hand

• Hand Diseases & Disorders

• Hand Injuries

• Hand, Foot, & Mouth Disease

• Hantavirus

• Hashimoto's Disease

• Head and Neck Cancer

• Head Injury

• Head Lice - See Lice

• Headache

See also: Migraine

• Heart Arrhythmias - See Arrhythmias

• Heart Attack (Myocardial Infarction)

See also: Acute Coronary Syndrome

• Heart Block

• Heart Disease in Women

• Heart Failure - See Congestive Heart Disease

• Heart Murmur

• Heart Rhythm Problems - See Arrhythmias

• Heartburn - See Gastroesophageal Reflux Disease

• Heat Cramps - See Hyperthermia

• Heat Exhaustion - See Hyperthermia

• Heat Stroke - See Hyperthermia

• Helicobacter pylori Infection

• Hemangioma

• Hematospermia

• Hematuria (Blood in the Urine)

• Hemifacial Spasm

• Hemochromatosis

• Hemolytic Anemia

• Hemolytic-Uremic Syndrome

• Hemophilia

• Hemoptysis

• Hemorrhagic Stroke

• Hemorrhoids

• Henoch-Schonlein Purpura

• Hepatic Encephalopathy

• Hepatitis

• Hepatorenal Syndrome

• Hernia

• Herniated Disk - See Prolapsed Intervertebral Disk

• Herpes Simplex

See also: Genital Herpes

See also: Cold Sores

• Herpes Zoster - See Shingles

• Hiatal Hernia

• Hiccups

• Hidradenitis Suppurativa

• High Blood Pressure - See Hypertension

• High Cholesterol

• High Triglycerides

• Hip Cartilage Tears

• Hip Dysplasia

• Hip Fracture

• Hip Pointer

• Hirschprung's Disease

• Hirsutism

• Histiocytosis X (Langerhans Cell Histiocytosis)

• Histoplasmosis

• Hives

• Hodgkin's Disease

• Hodgkin's Lymphoma - See Hodgkin's Disease

• Homocystinuria

• Human Papillomavirus Infection - See Genital Warts

• Hunter's Syndrome

• Huntington's Disease

• Hurler's Syndrome

• HUS - See Hemolytic-Uremic Syndrome

• Hydrocele

• Hydrocephalus

• Hydronephrosis

• Hyperaldosteronism

• Hypercalcemia

• Hypercholesterolemia - See High Cholesterol

• Hypercoagulable States

• Hyperglycemia

• Hyperhidrosis

• Hyperkalemia

• Hypernatremia

• Hyperopia

• Hyperparathyroidism

• Hypersensitivity Pneumonitis

• Hypertension

• Hyperthermia

• Hyperthyroidism

• Hypertrophic Cardiomyopathy

See also: Cardiomyopathy

• Hyphema

• Hypocalcemia

• Hypochondria

• Hypoglycemia

• Hypogonadism

• Hypokalemia

• Hyponatremia

• Hypoparathyroidism

• Hypoplastic Left Heart Syndrome

• Hypothermia

• Hypothyroidism