H
- H. pylori infection
- H1N1 flu
- H1N1 flu (swine flu)
- H1N1v flu
- H3N2v flu
- Hair loss
- Hair-pulling disorder
- Hairy cell leukemia
- Hairy tongue
- Halitosis
- Hallux valgus
- Hammertoe and mallet toe
- Hamstring injury
- Hand fracture
- Hand-foot-and-mouth disease
- Hangovers
- Hantavirus pulmonary syndrome
- Hardening of the arteries
- Hashimoto’s disease
- HAV infection
- Hay fever
- HBV infection
- HCC
- HCV infection
- Head and neck cancers
- Head lice
- Head trauma, coma
- Headache, chronic daily
- Headache, cluster
- Headache, exercise
- Headache, medication overuse
- Headache, migraine
- Headache, primary cough
- Headache, sex
- Headache, sinus
- Headache, spinal
- Headache, tension
- Headache, thunderclap
- Headaches in children
- Health anxiety
- Hearing loss
- Heart arrhythmia
- Heart attack
- Heart defects in adults
- Heart disease
- Heart failure
- Heart murmurs
- Heart palpitations
- Heart valve disease
- Heartburn
- Heat exhaustion
- Heat rash
- Heatstroke
- Heavy menstrual bleeding
- Heel pain
- Helicobacter pylori (H. pylori) infection
- Hemangioblastoma
- Hemangioma
- Hemangioma, liver
- Hematoma, intracranial
- Hematuria
- Hemifacial spasm
- Hemochromatosis
- Hemolytic uremic syndrome (HUS)
- Hemophilia
- Hemorrhoids
- Henoch-Schonlein purpura
- Hep A
- Hep B
- Hep C
- Hepatic encephalopathy
- Hepatitis A
- Hepatitis A virus infection
- Hepatitis B
- Hepatitis B virus infection
- Hepatitis C
- Hepatitis C virus infection
- Hepatitis, autoimmune
- Hepatitis, toxic
- Hepatocellular carcinoma (HCC)
- Hepatolenticular degeneration
- Hepatomegaly
- Hepatopulmonary syndrome
- Hereditary hemochromatosis
- Hereditary hemorrhagic telangiectasia
- Hereditary motor and sensory neuropathy
- Hereditary nonpolyposis colorectal cancer syndrome
- Hernia, hiatal
- Hernia, inguinal
- Hernia, umbilical
- Herniated disk
- Herpes zoster
- Herpes zoster oticus
- Herpes, genital
- HHT
- Hiatal hernia
- Hiccups
- Hidradenitis suppurativa
- High blood pressure (hypertension)
- High blood pressure in children
- High blood pressure, secondary
- High cholesterol
- High-flow priapism
- Hilar cholangiocarcinoma
- Hip dysplasia
- Hip fracture
- Hip labral tear
- Hirschsprung’s disease
- Hirsutism
- Histoplasmosis
- HIV/AIDS
- Hives and angioedema
- Hives, chronic
- HNPCC
- Hoarding disorder
- Hoarse voice
- Hodgkin disease
- Hodgkin lymphoma (Hodgkin disease)
- Hordeolum
- Horner syndrome
- Horner-Bernard syndrome
- Hot flashes
- HPV infection
- Human immunodeficiency virus
- Human papillomavirus infection
- Hunchback
- Hunt’s syndrome
- Huntington’s disease
- Hurthle cell cancer
- Hutchinson-Gilford progeria syndrome
- Hydrocele
- Hydrocephalus
- Hydronephrosis
- Hypercalcemia
- Hypercholesterolemia
- Hypercholesterolemia, familial
- Hypercortisolism
- Hypereosinophilic syndrome
- Hyperglycemia in diabetes
- Hyperhidrosis
- Hypermenorrhea
- Hyperopia
- Hyperoxaluria and oxalosis
- Hyperparathyroidism
- Hypersexuality
- Hypertension
- Hypertension, pregnancy-related
- Hypertension, pulmonary
- Hyperthyroidism (overactive thyroid)
- Hypertrophic cardiomyopathy
- Hypoactive sexual desire disorder
- Hypochondria
- Hypoglycemia
- Hypoglycemia, diabetic
- Hypohydration
- Hyponatremia
- Hypoparathyroidism
- Hypopituitarism
- Hypoplastic left heart syndrome
- Hypospadias
- Hypotension
- Hypothermia
- Hypothyroidism (underactive thyroid)