Conditions beginning with the letter H
- H1N1 Flu Virus (H1N1 Influenza, Influenza A (H1N1), Human Swine Flu)
- H1N1 Influenza (H1N1 Flu Virus, Influenza A (H1N1), Human Swine Flu)
- Hair Loss (Alopecia, Baldness)
- Halitosis
- Hand, Foot, and Mouth Disease (HFMD, Coxsackie Virus, Enterovirus)
- Hard Stools (Constipation, Difficulty Passing Stool)
- HAV and HBV (Hepatitis A and B, Viral Hepatitis (Hepatitis A and B), Hep B)
- Hay Fever (Pollinosis, Seasonal Allergic Rhinitis)
- Hay Fever (Allergic Rhinitis, Allergies, Pollinosis)
- Head Lice (Lice, Pediculosis)
- Headaches (Tension Headache, Sinus Headache, Migraine)
- Hearing Loss (Hearing Loss and Deafness, Deafness)
- Hearing Loss and Deafness (Deafness, Hearing Loss)
- Heart Artery Dilation (Angioplasty, PCTA, PCI)
- Heart Attack (Myocardial Infarction, MI)
- Heart Disease (Coronary Artery Disease, CAD)
- Heart Infection (Endocarditis, Infective Endocarditis)
- Heart Murmur (Mitral Valve Prolapse, MVP)
- Heartburn (GERD (Gastroesophageal reflux disease))
- Heat Exhaustion (Heat Stroke, Sunstroke, Thermic Fever)
- Heat Stroke (Sunstroke, Heat Exhaustion, Thermic Fever)
- Heel Spur (Plantar Fasciitis, Heel Spur Syndrome)
- Heel Spur Syndrome (Plantar Fasciitis, Heel Spur)
- Hematogenous Osteomyelitis (Osteomyelitis, Bone Infection)
- Hemochromatosis (Iron Overload, Hereditary Hemochromatosis)
- Hemoglobin S Disease (Sickle Cell Anemia, Sickle Cell Disease)
- Hemophilia (Classic Hemophilia, Christmas Disease)
- Hemophilus influenzae (Childhood Vaccination, Polio, Vaccination)
- Hemorrhagic Stroke (Stroke, Cerebrovascular Accident, Ischemic Stroke)
- Hemorrhoids (Piles, Rectal Swelling)
- Hep A (Hepatitis A and B, Viral Hepatitis (Hepatitis A and B), Hep B)
- Hep B (Hepatitis A and B, Viral Hepatitis (Hepatitis A and B), Hep A)
- Hep C (Hepatitis C)
- Hepatitis A and B (Viral Hepatitis (Hepatitis A and B), Hep B, Hep A)
- Hepatitis C (Hep C)
- Hereditary Hemochromatosis (Hemochromatosis, Iron Overload)
- Hernia
- Herniated Disc (Slipped Disc, Prolapsed Disc, Ruptured Disc)
- Herpes (Genital Herpes, HSV-1, HSV-2)
- Herpes Zoster (Shingles, Varicella-Zoster)
- HFMD (Hand, Foot, and Mouth Disease, Coxsackie Virus, Enterovirus)
- High Altitude Sickness (Altitude Sickness, Mountain Sickness)
- High Blood Pressure (Hypertension)
- High Blood Sugar (Diabetes, Hyperglycemia)
- High Cholesterol (Hyperlipidemia, Cholesterol)
- High Temperature (Fever, Elevated Temperature)
- High Thyroid (Hyperthyroidism, Overactive Thyroid, Thyroid Disorders)
- HIV/AIDS (Human Immunodeficiency Virus, AIDS)
- Hives (Urticarial Rash)
- Hodgkin's Disease
- Hordeolum (Styes)
- HPV Infection (Human Papillomavirus Infection)
- HSV-1 (Genital Herpes, Herpes, HSV-2)
- HSV-2 (Genital Herpes, Herpes, HSV-1)
- Human Immunodeficiency Virus (HIV/AIDS, AIDS)
- Human Papillomavirus Infection (HPV Infection)
- Human Parvovirus B19 (Fifth Disease, Erythema Infectiosum, Slapped-Cheek Disease)
- Human Swine Flu (H1N1 Influenza, H1N1 Flu Virus, Influenza A (H1N1))
- Huntington's Chorea (Huntington's Disease)
- Huntington's Disease (Huntington's Chorea)
- Hyperglycemia (Diabetes, High Blood Sugar)
- Hyperhidrosis (Excessive Sweating)
- Hyperlipidemia (High Cholesterol, Cholesterol)
- Hyperopia (Farsightedness, Presbyopia)
- Hypertension (High Blood Pressure)
- Hyperthyroidism (High Thyroid, Overactive Thyroid, Thyroid Disorders)
- Hyperuricemia (Gout, Gouty Arthritis)
- Hypocortisolism (Addison's Disease, Adrenal Insufficiency, Primary Adrenal Insufficiency)
- Hypoglycemia (Low Blood Sugar, Low Blood Glucose)
- Hypoplastic Anemia (Aplastic Anemia, Aregenerative Anemia, Panmyelopathy)
- Hypotension (Low Blood Pressure, Orthostatic Hypotension)
- Hypothermia and Frostbite
- Hypothyroidism (Thyroid Problems, Low Thyroid, Underactive Thyroid)
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