Aerobic exercise
Learning Center
Phantosmia: What causes olfactory hallucinations?
Phantosmia is often due to a head injury or upper respiratory infection.
Hypertensive crisis: What are the symptoms?
A sudden rise in blood pressure over 180/120 mm Hg is considered a medical emergency, or crisis. It can lead to a stroke. Know the symptoms.
Tonic-clonic (grand mal) seizure
Learn about this type of seizure that can cause convulsions. Also know how to help if you see someone having one.
Lack of sleep: Can it make you sick?
Lack of sleep can affect your immune system. Here's what you need to know.
What is thirdhand smoke, and why is it a concern?
Tobacco smoke creates toxic residue that clings to walls, carpets, clothes and other surfaces.
Tinnitus causes: Could my antidepressant be the culprit?
Ringing in the ears, also known as tinnitus, has many possible causes, such as taking antidepressants.
Rheumatoid arthritis: Can it affect the eyes?
Although rheumatoid arthritis is primarily a joint disease, it occasionally affects the eyes.
Exercise: How much do I need every day?
Find out how much exercise you need and how to get it.
Rheumatoid arthritis: Can it affect the lungs?
Although rheumatoid arthritis primarily affects the joints, it can also affect the lungs.
Priapism
Understand the symptoms, possible causes and treatment of prolonged erection of the penis, including when to seek emergency care.
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