Fitness basics
Learning Center
Varicocele
Find out how this condition involving the enlargement of veins in the scrotum can affect sperm quality and production.
Bacterial vaginosis
Learn about symptoms, treatments and prevention of this common vaginal condition.
Erectile dysfunction
Understand what can cause the inability to get and keep an erection firm enough for sex and the possible treatment options.
Seborrheic dermatitis
Find out what you can do to treat this flaky skin condition that can cause scaly skin and stubborn, itchy dandruff.
Delayed ejaculation
Learn what can cause delayed or absent ejaculation and how it can be treated.
Keratoconus
When your cornea bulges outward, it can cause blurry vision and make your eyes sensitive to light. Find out about symptoms, causes and treatment for this eye condition.
Narcolepsy
Learn more about this sleep disorder that causes periods of involuntary sleep, sleep paralysis and early rapid eye movement (REM) sleep.
Chickenpox
Learn more about preventing this once-common childhood illness. Also, find out how to recognize and manage it.
Hydrocele
Find out more about the symptoms, causes and treatments for this swelling in the scrotum.
COPD
This chronic inflammatory lung disease causes obstructed airflow from the lungs, resulting in breathing difficulty, cough, mucus production and wheezing.
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