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A Baker cyst is usually the result of a problem with the knee joint, such as arthritis or a cartilage tear. Both conditions can cause the knee to produce too much fluid.

Acanthosis nigricans is a condition that causes areas of dark, thick velvety skin in body folds and creases. It typically affects the armpits, groinand neck.

Providing care at home for a person sick with COVID-19? Or caring for yourself at home? Understand when emergency care is needed and what you can do to prevent the spread of infection.