Aerobic exercise
Learning Center
Acute kidney injury
Learn what happens when the kidneys suddenly stop working, what causes this condition and how it's treated.
Acute coronary syndrome
Know the symptoms, causes and treatment of this heart condition. The term refers to many conditions that cause sudden, low blood flow to the heart.
Acute bronchitis: Is it contagious?
Most cases of acute bronchitis are caused by viruses and are contagious. Learn ways to reduce your risk of catching viruses that can cause bronchitis.
Acupuncture
Practitioners use this integrative medicine technique to treat common problems such as back pain, neck pain and joint pain to influence energy flow.
Active surveillance for prostate cancer
Learn about why doctors may recommend active surveillance for prostate cancer and what to expect.
Actinic keratosis
Find out more about this skin condition that causes a rough, scaly patch after years of ultraviolet exposure from the sun or indoor tanning.
Acromegaly
An excess of growth hormone causes the bones to keep growing, which can lead to a number of serious complications if left untreated.
Acoustic neuroma
This noncancerous tumor can sometimes grow on the nerve in the head that affects hearing and balance.
Acne scars: What's the best treatment?
Various procedures can improve acne scars, but no single treatment is best for everyone.
Acne
Learn more about this common skin condition, including causes, treatments and simple skin care steps you can do at home to help control it.
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