- Head and neck cancer
- Headache
- Hearing loss
- Heart disease
- Heart failure
- Heart transplant complications
- Helicobacter pylori
- Hematopoietic stem cell transplant (HSCT)
- Hemifacial spasm
- Hemiplegic shoulder pain
- Hemodialysis graft dysfunction
- Hemolytic anemia
- Hemorrhagic disease
- Hemorrhoids
- Hepatic encephalopathy
- Hepatitis
- Hepatitis A
- Hepatitis B
- Hepatitis C
- Hepatitis-related fatigue
- Hepatopulmonary syndrome
- Hepatorenal syndrome
- Hereditary hemorrhagic telangiectasia (HHT)
- Hereditary motor and sensory neuropathy
- Herniated disc
- Herpes keratitis
- Herpes labialis (cold sores)
- Herpes zoster (shingles)
Common Conditions
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