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MedlinePlus is a service of the National Library of Medicine (NLM), the world's largest medical library, which is part of the National Institutes of Health (NIH). It was built as an online health information resource for patients and their families and friends.

MedlinePlus presents high-quality, easy to understand, relevant health and wellness information that is trusted.

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Phenylketonuria - National Library of Medicine

Phenylketonuria (PKU) is a type of amino acid metabolism disorder. It is inherited. If you have it, your body can't process phenylalanine (Phe). Phe is an amino acid, a building block of proteins. It is in almost ...

Pleural Disorders - National Library of Medicine

Your pleura is a large, thin sheet of tissue that wraps around the outside of your lungs and lines the inside of your ... cavity. Between the layers of the pleura is a very thin space. Normally it's filled with a ...

Rabies - National Library of Medicine

Rabies is a deadly animal disease caused by a virus. It can happen in wild animals, including raccoons, skunks, bats and ... the symptoms begin, the disease is usually fatal. A series of shots can prevent rabies in people ...

Rosacea - National Library of Medicine

Rosacea is a long-term disease that affects your skin and sometimes your eyes. It causes redness and pimples. Rosacea is ... flushing Small, red lines under the skin Acne A swollen nose Thick skin, usually on the forehead, ...

Rubella - National Library of Medicine

Rubella is an infection caused by a virus. It is usually mild with fever and a rash. About half of the people who get rubella do not have symptoms. If you do get them, symptoms may include: A rash that starts on the face and spreads ...

Sexual Health - National Library of Medicine

Sexuality is a big part of being human. Love, affection and sexual intimacy all play a role in healthy relationships. They also contribute to your sense of well-being. A number of disorders can affect the ability to ...

Smokeless Tobacco - National Library of Medicine

... go beyond the mouth. It might also play a role in other cancers, heart disease and stroke. ... tobacco contains more nicotine than cigarettes. Nicotine is a highly addictive drug that makes it hard to ...

Sodium - National Library of Medicine

Table salt is a combination of two minerals - sodium and chloride Your body needs some sodium to work properly. It helps with the ... more sodium in their diets than they need. A key to healthy eating is choosing foods low ...

Spinal Cord Diseases - National Library of Medicine

Your spinal cord is a bundle of nerves that runs down the middle of your back. It carries signals back and forth between your body ... Other spinal cord problems include: Tumors Infections such as meningitis and polio Inflammatory diseases Autoimmune diseases Degenerative ...

Sports Safety - National Library of Medicine

... careful. You can help prevent injuries by: Getting a physical to make sure you are healthy before ... stretching If you have already hurt yourself playing a sport, make sure you recover completely before you ...

Sun Exposure - National Library of Medicine

... skin and damage your skin cells. Sunburns are a sign of skin damage. Suntans aren't healthy, ... the sun when it is strongest (between 10 a.m. and 2 p.m.) Use sunscreen with ...

Sweat - National Library of Medicine

Sweat is a clear, salty liquid produced by glands in your skin. Sweating is how your body cools itself. You sweat ... with bacteria on your skin, it can cause a smell. Bathing regularly and using antiperspirants or deodorants ...

Tailbone Disorders - National Library of Medicine

... Instead, most injuries cause bruises or pulled ligaments. A backward fall onto a hard surface, such as slipping on ice, is the most common cause ... pressure on nerves in the tailbone area, and a mass or growth you can see or feel.

Tendinitis - National Library of Medicine

... your bones. Tendinitis is the severe swelling of a tendon. Tendinitis usually happens after repeated injury to an area such as the wrist or ankle. It causes pain and ...

Toddler Development - National Library of Medicine

Mastering new skills such as how to walk, talk, and use the potty are developmental milestones. It is exciting to watch your toddler learn new ... not develop at the same rate. There is a wide range of what is considered "normal." Your ...



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