See Conditions by First Letter (H)
- Habits
- Haemophilus Infections
- Haemophilus Influenzae
- Hailey-Hailey Disease
- Hairy Cell Leukemia
- Halitosis
- Hallucinations
- Hallux Limitus
- Hallux Rigidus
- Hallux Valgus
- Hallux Varus
- Hamartoma
- Hamartoma Syndrome, Multiple
- Hammer Toe Syndrome
- Hand Deformities
- Hand Deformities, Congenital
- Hand Dermatoses
- Hand Injuries
- Hand, Foot and Mouth Disease
- Hand-Schuller-Christian Disease
- Hansen's Disease
- Hantavirus Infections
- Hantavirus Pulmonary Syndrome
- Hashimoto Disease
- Head and Neck Neoplasms
- Head Injuries, Closed
- Head Injuries, Penetrating
- Headache
- Headache Disorders
- Headache Disorders, Primary
- Headache Disorders, Secondary
- Hearing Disorders
- Hearing Loss
- Hearing Loss, Bilateral
- Hearing Loss, Central
- Hearing Loss, Conductive
- Hearing Loss, Mixed Conductive-Sensorineural
- Hearing Loss, Noise-Induced
- Hearing Loss, Sensorineural
- Hearing Loss, Sudden
- Hearing Loss, Unilateral
- Heart Aneurysm
- Heart Arrest
- Heart Block
- Heart Defects, Congenital
- Heart Diseases
- Heart Failure
- Heart Failure, Diastolic
- Heart Failure, Systolic
- Heart Injuries
- Heart Murmurs
- Heart Neoplasms
- Heart Septal Defects
- Heart Septal Defects, Atrial
- Heart Septal Defects, Ventricular
- Heart Tumor
- Heart Valve Diseases
- Heartburn
- Heat Exhaustion
- Heat Stress Disorders
- Heat Stroke
- Heavy Metal Poisoning
- Heel Spur
- Helicobacter Infections
- HELLP Syndrome
- Helminthiasis
- Hemangioblastoma
- Hemangioendothelioma
- Hemangioendothelioma, Epithelioid
- Hemangioma
- Hemangioma, Capillary
- Hemangioma, Cavernous
- Hemangioma, Cavernous, Central Nervous System
- Hemangiopericytoma
- Hemangiosarcoma
- Hemarthrosis
- Hematemesis
- Hematologic Diseases
- Hematologic Neoplasms
- Hematoma
- Hematoma, Subdural
- Hematoma, Subdural, Chronic
- Hematoma, Subdural, Intracranial
- Hematuria
- Hemianopsia
- Hemifacial Microsomia
- Hemifacial Spasm
- Hemiplegia
- Hemiplegic Migraine
- Hemochromatosis
- Hemoglobin C Disease
- Hemoglobin SC Disease
- Hemoglobinopathies
- Hemoglobinuria
- Hemoglobinuria, Paroxysmal
- Hemolysis
- Hemolytic-Uremic Syndrome
- Hemoperitoneum
- Hemophagocytic Lymphohistiocytosis
- Hemophilia
- Hemophilia A
- Hemophilia A, Acquired
- Hemophilia A, Congenital
- Hemophilia B
- Hemophilic Arthropathy
- Hemopneumothorax
- Hemoptysis
- Hemorrhage
- Hemorrhagic Disorders
- Hemorrhagic Fever
- Hemorrhagic Fever with Renal Syndrome
- Hemorrhagic Fever, Crimean
- Hemorrhagic Fever, Ebola
- Hemorrhagic Fevers, Viral
- Hemorrhoids
- Hemosiderosis
- Hemospermia
- Hemostatic Disorders
- Hemothorax
- Henoch-Schonlein Purpura
- Hepadnaviridae Infections
- Heparin-induced Thrombocytopenia
- Hepatic Encephalopathy
- Hepatic Insufficiency
- Hepatic Veno-Occlusive Disease
- Hepatitis
- Hepatitis A
- Hepatitis B
- Hepatitis B, Chronic
- Hepatitis C
- Hepatitis C, Chronic
- Hepatitis D
- Hepatitis D, Chronic
- Hepatitis E
- Hepatitis, Alcoholic
- Hepatitis, Autoimmune
- Hepatitis, Chronic
- Hepatitis, Viral, Human
- Hepatoblastoma
- Hepatocellular Carcinoma (fibrolamellar Variant)
- Hepatocellular Carcinoma, Childhood
- Hepatolenticular Degeneration
- Hepatomegaly
- Hepatopulmonary Syndrome
- Hepatorenal Syndrome
- Hereditary Amyloidosis
- Hereditary Angioedema
- Hereditary Angioedema Types I and II
- Hereditary Ataxia
- Hereditary Autoinflammatory Diseases
- Hereditary Central Nervous System Demyelinating Diseases
- Hereditary Coproporphyria
- Hereditary Elliptocytosis
- Hereditary Fructose Intolerance
- Hereditary Hemorrhagic Telangiectasia
- Hereditary Hyperuricemia
- Hereditary Multiple Osteochondromas
- Hereditary Neuropathy With Liability to Pressure Palsy
- Hereditary Pancreatitis
- Hereditary Sensory and Autonomic Neuropathies
- Hereditary Sensory and Motor Neuropathy
- Hereditary Spastic Paraplegia
- Hereditary Spherocytosis
- Heredodegenerative Disorders, Nervous System
- Hermanski-Pudlak Syndrome
- Hermansky-Pudlak Syndrome
- Hernia
- Hernia, Abdominal
- Hernia, Diaphragmatic
- Hernia, Femoral
- Hernia, Hiatal
- Hernia, Inguinal
- Hernia, Umbilical
- Hernia, Ventral
- Heroin Dependence
- Herpangina
- Herpes Genitalis
- Herpes Labialis
- Herpes Simplex
- Herpes Simplex Encephalitis
- Herpes Zoster
- Herpes Zoster Ophthalmicus
- Herpesviridae Infections
- Herpetic Keratitis
- Heterotaxy
- Hiccup
- Hidradenitis
- Hidradenitis Suppurativa
- Hip Dislocation
- Hip Dislocation, Congenital
- Hip Fractures
- Hip Injuries
- Hirschsprung Disease
- Hirsutism
- His Bundle Tachycardia
- Histiocytic Necrotizing Lymphadenitis
- Histiocytoma
- Histiocytoma, Benign Fibrous
- Histiocytoma, Malignant Fibrous
- Histiocytosis
- Histiocytosis, Langerhans-Cell
- Histoplasmosis
- HIV Enteropathy
- HIV Infections
- HIV Seropositivity
- HIV Wasting Syndrome
- HIV-Associated Lipodystrophy Syndrome
- Hoarseness
- Hodgkin Disease
- Hodgkin Lymphoma
- Hodgkin Lymphoma, Childhood
- Holoprosencephaly
- Homocysteinemia
- Homocystinuria
- Homologous Wasting Disease
- Hookworm Infections
- Hordeolum
- Hot Flashes
- Hoyeraal Hreidarsson Syndrome
- HTLV-1 Associated Myelopathy/tropical Spastic Paraparesis
- HTLV-I Infections
- HTLV-II Infections
- Human T-cell Leukemia Virus Type 1
- Human T-cell Leukemia Virus Type 2
- Humeral Fractures
- Hunter-McAlpine Syndrome
- Huntington Disease
- Hurthle Cell Thyroid Cancer
- Hutchinson's Melanotic Freckle
- Hyaline Membrane Disease
- Hydatidiform Mole
- Hydatidosis
- Hydrarthrosis
- Hydrocephalus
- Hydrocephalus, Normal Pressure
- Hydronephrosis
- Hydrophthalmos
- Hydrops Fetalis
- Hydrothorax
- Hyper IgE Syndrome
- Hyper-IgD Syndrome
- Hyper-IgM Immunodeficiency Syndrome
- Hyper-IgM Immunodeficiency Syndrome, Type 1
- Hyperacusis
- Hyperadrenalism
- Hyperaldosteronism
- Hyperalgesia
- Hyperammonemia
- Hyperandrogenism
- Hyperargininemia
- Hyperbilirubinemia
- Hyperbilirubinemia, Neonatal
- Hypercalcemia
- Hypercalciuria
- Hypercapnia
- Hypercholesterolemia
- Hyperemesis Gravidarum
- Hyperemia
- Hypereosinophilic Syndrome
- Hyperglycemia
- Hyperhidrosis
- Hyperhomocysteinemia
- Hyperinsulinism
- Hyperkalemia
- Hyperkeratosis, Epidermolytic
- Hyperkinesis
- Hyperlipidemia Type 3
- Hyperlipidemia, Familial Combined
- Hyperlipidemias
- Hyperlipoproteinemia Type 1
- Hyperlipoproteinemia Type 2
- Hyperlipoproteinemia Type 5
- Hyperlipoproteinemia Type I
- Hyperlipoproteinemia Type II
- Hyperlipoproteinemia Type III
- Hyperlipoproteinemia Type IV
- Hyperlipoproteinemia Type V
- Hyperlipoproteinemias
- Hypernatremia
- Hyperopia
- Hyperostosis
- Hyperoxaluria
- Hyperoxaluria, Primary
- Hyperoxia
- Hyperparathyroidism
- Hyperparathyroidism, Primary
- Hyperparathyroidism, Secondary
- Hyperphagia
- Hyperphosphatemia
- Hyperpigmentation
- Hyperplasia
- Hyperprolactinemia
- Hypersensitivity
- Hypersensitivity Vasculitis
- Hypersensitivity, Delayed
- Hypersensitivity, Immediate
- Hypersomnolence, Idiopathic
- Hypersplenism
- Hypertelorism
- Hypertension
- Hypertension, Malignant
- Hypertension, Portal
- Hypertension, Pregnancy-Induced
- Hypertension, Pulmonary
- Hypertension, Renal
- Hypertension, Renovascular
- Hypertensive Encephalopathy
- Hypertensive Retinopathy
- Hyperthyroidism
- Hypertrichosis
- Hypertriglyceridemia
- Hypertrophy
- Hypertrophy, Left Ventricular
- Hypertrophy, Right Ventricular
- Hyperuricemia
- Hyperventilation
- Hypesthesia
- Hypoadrenalism
- Hypoalbuminemia
- Hypoaldosteronism
- Hypoalphalipoproteinemias
- Hypobetalipoproteinemias
- Hypocalcemia
- Hypochondriasis
- Hypochondroplasia
- Hypocomplementemic Urticarial Vasculitis
- Hypoglycemia
- Hypogonadism
- Hypohidrotic Ectodermal Dysplasia
- Hypokalemia
- Hypokalemic Periodic Paralysis
- Hypokinesia
- Hypolipoproteinemias
- Hypomagnesemia Primary
- Hypomelanotic Disorder
- Hyponatremia
- Hypoparathyroidism
- Hypopharyngeal Cancer
- Hypopharyngeal Neoplasms
- Hypophosphatasia
- Hypophosphatemia
- Hypophosphatemia, Familial
- Hypophosphatemic Rickets
- Hypophosphatemic Rickets, X-Linked Dominant
- Hypopigmentation
- Hypopituitarism
- Hypoplastic Left Heart Syndrome
- Hypoplastic Right Heart Syndrome
- Hypospadias
- Hypotension
- Hypotension, Orthostatic
- Hypothermia
- Hypothyroidism
- Hypotrichosis
- Hypoventilation
- Hypovolemia
- Hypoxia, Brain
- Hypoxia-Ischemia, Brain
- Hysteria