Weight-loss basics
Learning Center
Infectious diseases
Viruses, bacteria, fungi and parasites can all cause infection. Find out more about how to prevent and treat these conditions.
Hydrocephalus
Learn about this potentially fatal condition that causes fluid buildup in the brain. It can cause a range of symptoms, from headaches to poor balance.
Hodgkin lymphoma (Hodgkin disease)
Learn how this cancer differs from other lymphomas. Find out about risk factors and treatments, such as chemotherapy, radiation and bone marrow transplant.
Hip fracture
The risk of breaking a hip increases with age. Learn about lifestyle changes that can keep bones strong and reduce risk of breaking.
Hiccups
Caused by spasms of your diaphragm that you can't control, hiccups are usually harmless. Rarely, hiccups may be a sign of an underlying medical problem.
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.
Heavy menstrual bleeding
Learn about the causes and treatment of heavy menstrual periods.
Heatstroke
Know the signs and what to do for this dangerous increase in body temperature.
Heart palpitations
Know when and how feelings of a rapid, fluttering or pounding heartbeat are treated.
Heart failure
Learn about this chronic disease that needs lifelong management. Find out what treatments help you live longer and may even strengthen your heart.
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