1. H1N1 flu, also known asSwine flu (H1N1 flu))
  2. Hair loss
  3. Hair-pulling disorder, also known asTrichotillomania (hair-pulling disorder))
  4. Hairy cell leukemia
  5. Hairy tongue, also known asBlack hairy tongue)
  6. Halitosis, also known asBad breath)
  7. Hammertoe and mallet toe
  8. Hamstring injury
  9. Hand fracture, also known asBroken hand)
  10. Hand pain, also known asWrist pain)
  11. Hand-foot-and-mouth disease
  12. Hangovers
  13. Hantavirus pulmonary syndrome
  14. Hardening of the arteries, also known asArteriosclerosis / atherosclerosis)
  15. Hashimoto's disease
  16. Hay fever
  17. Head and neck cancers
  18. Head lice
  19. Head trauma, coma, also known asComa)
  20. Headache, chronic daily, also known asChronic daily headaches)
  21. Headache, cluster, also known asCluster headache)
  22. Headache, exercise, also known asExercise headaches)
  23. Headache, external compression, also known asExternal compression headaches)
  24. Headache, ice cream, also known asIce cream headaches)
  25. Headache, migraine, also known asMigraine)
  26. Headache, primary cough, also known asCough headaches)
  27. Headache, sex, also known asSex headaches)
  28. Headache, sinus, also known asSinus headaches)
  29. Headache, spinal, also known asSpinal headaches)
  30. Headache, tension, also known asTension headache)
  31. Headache, thunderclap, also known asThunderclap headaches)
  32. Headaches in children
  33. Health anxiety, also known asIllness anxiety disorder)
  34. Hearing loss
  35. Heart arrhythmia
  36. Heart attack
  37. Heart defects in adults, also known asCongenital heart disease in adults)
  38. Heart disease
  39. Heart failure
  40. Heart murmurs
  41. Heart palpitations
  42. Heart valve disease
  43. Heartburn, also known asIndigestion)
  44. Heartburn
  45. Heat exhaustion
  46. Heat rash
  47. Heatstroke
  48. Heavy menstrual periods, also known asMenorrhagia (heavy menstrual bleeding))
  49. Heel pain, also known asPlantar fasciitis)
  50. Helicobacter pylori, also known asHelicobacter pylori (H. pylori) infection)
  51. Helicobacter pylori (H. pylori) infection
  52. Hemangioma
  53. Hemangioma, liver, also known asLiver hemangioma)
  54. Hematoma, intracranial, also known asIntracranial hematoma)
  55. Hematuria, also known asBlood in urine (hematuria))
  56. Hemifacial spasm
  57. Hemochromatosis
  58. Hemolytic uremic syndrome (HUS)
  59. Hemophilia
  60. Hemorrhoids
  61. Henoch-Schonlein purpura
  62. Hepatitis A
  63. Hepatitis B
  64. Hepatitis C
  65. Hepatitis, autoimmune, also known asAutoimmune hepatitis)
  66. Hepatitis, toxic, also known asToxic hepatitis)
  67. Hepatocellular carcinoma
  68. Hepatomegaly, also known asEnlarged liver)
  69. Hepatopulmonary syndrome
  70. Hereditary hemochromatosis, also known asHemochromatosis)
  71. Hereditary hemorrhagic telangiectasia
  72. Hereditary motor and sensory neuropathy, also known asCharcot-Marie-Tooth disease)
  73. Hereditary nonpolyposis colorectal cancer syndrome, also known asLynch syndrome)
  74. Hereditary progressive arthro-ophthalmopathy, also known asStickler syndrome)
  75. Hernia, hiatal, also known asHiatal hernia)
  76. Hernia, inguinal, also known asInguinal hernia)
  77. Hernia, umbilical, also known asUmbilical hernia)
  78. Herniated disk
  79. Herpes zoster, also known asShingles)
  80. Herpes zoster oticus, also known asRamsay Hunt syndrome)
  81. Herpes, genital, also known asGenital herpes)
  82. Hiatal hernia
  83. Hiccups
  84. Hidradenitis suppurativa
  85. High blood pressure (hypertension)
  86. High blood pressure in children
  87. High blood pressure, secondary, also known asSecondary hypertension)
  88. High cholesterol
  89. High-flow priapism, also known asPriapism)
  90. Hilar cholangiocarcinoma
  91. Hip dysplasia
  92. Hip fracture
  93. Hip impingement
  94. Hip labral tear
  95. Hirschsprung's disease
  96. Hirsutism
  97. Histoplasmosis
  98. HIV/AIDS
  99. Hives and angioedema
  100. Hives, chronic, also known asChronic hives)
  101. Hoarding disorder
  102. Hoarse voice, also known asLaryngitis)
  103. Hodgkin's disease, also known asHodgkin's lymphoma (Hodgkin's disease))
  104. Hodgkin's lymphoma (Hodgkin's disease)
  105. Hordeolum, also known asSty)
  106. Horner syndrome
  107. Horner-Bernard syndrome, also known asHorner syndrome)
  108. Hot flashes
  109. HPV infection
  110. Human immunodeficiency virus, also known asHIV/AIDS)
  111. Human papillomavirus infection, also known asHPV infection)
  112. Hunchback, also known asKyphosis)
  113. Hunter syndrome
  114. Huntington's disease
  115. Hunt's syndrome, also known asRamsay Hunt syndrome)
  116. Hurthle cell cancer
  117. Hutchinson-Gilford progeria syndrome, also known asProgeria)
  118. Hydrocele
  119. Hydrocephalus
  120. Hydronephrosis
  121. Hypercalcemia
  122. Hypercholesterolemia, also known asHigh cholesterol)
  123. Hypercholesterolemia, familial, also known asFamilial hypercholesterolemia)
  124. Hypercortisolism, also known asCushing syndrome)
  125. Hypereosinophilic syndrome
  126. Hyperglycemia in diabetes
  127. Hyperhidrosis
  128. Hypermenorrhea, also known asMenorrhagia (heavy menstrual bleeding))
  129. Hyperopia, also known asFarsightedness)
  130. Hyperoxaluria and oxalosis
  131. Hyperparathyroidism
  132. Hypersexuality, also known asCompulsive sexual behavior)
  133. Hypertension, also known asHigh blood pressure (hypertension))
  134. Hypertension, pregnancy-related, also known asPreeclampsia)
  135. Hypertension, pulmonary, also known asPulmonary hypertension)
  136. Hyperthyroidism (overactive thyroid)
  137. Hypertrophic cardiomyopathy
  138. Hypoactive sexual desire disorder, also known asLow sex drive in women)
  139. Hypochondria, also known asIllness anxiety disorder)
  140. Hypoglycemia
  141. Hypoglycemia, diabetic, also known asDiabetic hypoglycemia)
  142. Hypohidrosis, also known asAnhidrosis)
  143. Hypohydration, also known asDehydration)
  144. Hyponatremia
  145. Hypoparathyroidism
  146. Hypopituitarism
  147. Hypoplastic left heart syndrome
  148. Hypospadias
  149. Hypotension, also known asLow blood pressure (hypotension))
  150. Hypothermia
  151. Hypothyroidism (underactive thyroid)
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