Toddler health
Learning Center
Hemolytic uremic syndrome (HUS)
Damage to the small blood vessels in the kidneys can cause clots that clog the organ's filtering system. This can lead to life-threatening kidney failure.
Henoch-Schonlein purpura
Learn about the symptoms, causes and treatment of this blood vessel disease, also called IgA vasculitis, that causes a purplish rash on the lower legs.
Hepatitis C
Many people with this infection don't know they have it. Find out about symptoms and treatment for this liver disease that can be dangerous.
Hepatitis C: What happens in end-stage liver disease?
End-stage complications of hepatitis C include liver failure and liver cancer.
High blood pressure and sex: Overcome the challenges
High blood pressure may affect sex. Talking openly with a health care provider about problems and possible solutions can help.
High blood pressure dangers: Hypertension's effects on your body
If blood pressure stays high, it can cause other health conditions. Find out more about these complications.
High cholesterol in children: How is it treated?
High cholesterol in children can lead to narrowed and hardened arteries, increasing the risk of heart disease later in life.
High-risk pregnancy: Know what to expect
Find out what to expect during a high-risk pregnancy and learn steps you can take to stay healthy.
Hormone therapy for prostate cancer
Find out what to expect during testosterone-blocking therapy. Learn about choices, including medicines and surgery.
Hydrocele
Find out more about the symptoms, causes and treatments for this swelling in the scrotum.
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