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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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Rickets - National Library of Medicine

... containing vitamin D because of lactose intolerance or a strict vegetarian diet Is breastfed without receiving vitamin ... t make or use vitamin D because of a medical disorder such as celiac disease In addition ...

Rotavirus Infections - National Library of Medicine

Rotavirus is a virus that causes gastroenteritis. Symptoms include severe diarrhea, vomiting, fever, and dehydration. Almost all children in the U.S. ... to other children and sometimes to adults. Once a child gets the virus, it takes about two ...

Sexual Problems in Men - National Library of Medicine

... men have sexual problems. They become more common as men age. Problems can include: Erectile dysfunction Reduced ... function are common. If problems last more than a few months or cause distress for you or ...

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 ...

Syphilis - National Library of Medicine

Syphilis is a sexually transmitted infection (STI) caused by bacteria. It infects the genital area, lips, mouth, or anus of both ... pregnancy. The early stage of syphilis usually causes a single, small, painless sore. Sometimes it causes swelling ...

Tears - National Library of Medicine

You may only think of tears as those salty drops that fall from your eyes when you cry. Actually, your tears clean your eyes every time you blink. Tears ...

Teen Violence - National Library of Medicine

... into young adulthood. The young person can be a victim, an offender, or a witness to the violence. Violent acts can include: ... kicking, slapping, or hitting Use of weapons such as guns or knives Some violent acts can cause ...

Thyroid Diseases - National Library of Medicine

Your thyroid is a small, butterfly-shaped gland in the front of your neck. It makes hormones that control the way the body ... thyroid diseases, your health care provider may use a medical history, physical exam, and thyroid tests. In ...

Thyroid Tests - National Library of Medicine

Your thyroid is a small, butterfly-shaped gland in the front of your neck. It makes hormones that control the way the body ... help find the cause of thyroid diseases such as hyperthyroidism and hypothyroidism. Thyroid tests include blood tests ...

Tourette Syndrome - National Library of Medicine

... rarely, blurt out swear words. Tourette syndrome is a disorder of the nervous system. It often occurs with other problems, such as: Attention deficit hyperactivity disorder (ADHD) Obsessive-compulsive disorder ( ...

Traveler's Health - National Library of Medicine

Traveling can increase your chances of getting sick. A long flight can increase your risk for deep ... use iodine tablets. Food poisoning can also be a risk. Eat only food that is fully cooked ...

Trichomoniasis - National Library of Medicine

Trichomoniasis is a sexually transmitted infection (STI) caused by a parasite. It spreads from person to person during sex. Many people ... early, and their babies are more likely have a low birth weight. Lab tests can tell if ...

Ureteral Disorders - National Library of Medicine

... or backs up the ureter, you may get a urinary tract infection. Doctors diagnose problems with the ... x-rays, and examination of the ureter with a scope called a cystoscope. Treatment depends on the ...

Urine and Urination - National Library of Medicine

... you are ready to urinate. It swells into a round shape when it is full and gets ... problems like incontinence, overactive bladder, or interstitial cystitis A blockage that prevents you from emptying your bladder ...

Usher Syndrome - National Library of Medicine

... from birth and have severe balance problems from a young age. Vision problems usually start by age ... hearing loss. There is no cure. Tools such as hearing aids or cochlear implants can help some ...

Vitamin E - National Library of Medicine

... normally. Vitamin E is an antioxidant. It plays a role in your immune system and metabolic processes. ... foods they eat. People with certain disorders, such as liver diseases, cystic fibrosis, and Crohn's disease may ...



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