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Ptosis is when the upper eyelid droops down more than it should. If the ptosis is severe, it may block vision.

Pubic lice are small parasitic insects. They mostly live in the genital areas of humans. Learn more about pubic lice, including cause, symptoms, and treatment.

Restrictive cardiomyopathy, or RCM, is when the chambers of the heart become stiffer over time. Read on to learn details about this condition.

Rheumatoid vasculitis is a condition that causes blood vessels to be inflamed. It happens in some people who have had rheumatoid arthritis (RA) for a long time.

Right bundle branch block comes from a problem with the heart's ability to send electrical signals. It usually doesn't cause symptoms unless you have some other heart condition. Read on for details about this condition.

A seborrheic keratosis is a growth on the skin. The growth is not cancer (benign). Its color can range from white, tan, brown, or black. Seborrheic keratoses often appear on a person’s chest, arms, back, or other areas. They’re very common in people older than age 50, but younger adults can get them as well.

Simple kidney cysts are fluid-filled sacs that form in your kidneys. These cysts usually don’t affect how the kidneys function.

Sinus bradycardia is a type of slow heartbeat. Read on to learn more about this condition, including causes, risk factors, symptoms, diagnosis, and treatment.

Sixth nerve palsy occurs when the sixth cranial nerve is damaged or doesn't work right. It's also known as the abducens nerve. This condition causes problems with eye movement.