Health Library A to Z

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• Common Cold in Children
The common cold is one of the most common illnesses in children. Most children will have at least 6 to 8 colds a year.

• Echocardiography for Children
Echocardiography is an imaging test. It uses sound waves to make detailed pictures of the heart.

• Major Depression in Teens
Major depression goes beyond the day's normal ups and downs. It involves a teen's body, mood, and thoughts. It can affect and disrupt eating, sleeping, or thinking patterns.

• Transesophageal Echocardiography for Children
Echocardiography is an imaging test. It uses sound waves to make detailed moving pictures of the heart. It shows the size and shape of the heart, as well as the heart chambers and valves. Transesophageal echocardiography (TEE) uses a device, called a transducer, that is placed in the esophagus.

• U.S. Cancer Cases, Deaths Continue to Fall

• U.S. Cases of Infant Gut Illness Plummet After Vaccine Introduced

• U.S. Dentists Prescribe 37 Times More Opioids Than in England: Study

• U.S. Flu Activity Low Right Now, but Rising: CDC

• U.S. Flu Season Ebbing, but Cases Still Widespread: CDC

• U.S. Heart Failure Rates Are Rising, Especially for Black Adults

• U.S. Hospitals Making Headway Against Infections

• U.S. Leads Health Care Spending Among Richer Nations, But Gets Less

• U.S. Measles Cases for 2019 Already Exceed All Annual Totals Since 1994: CDC

• U.S. Murder, Suicide Rates Climbing Again

• U.S. Opioid Epidemic Fueling Life Expectancy Decline

• U.S. Pedestrian Deaths Hit 30-Year High in 2018: Report

• U.S. Teen Opioid Deaths Soaring

• U.S. Trauma Doctors Push for Stricter Gun Controls

• U.S. Youth Suicide Rate Reaches 20-Year High

• Ulcerative Colitis in Children
Ulcerative colitis is an inflammatory bowel disease (IBD). In this condition, the inner lining of your child’s large intestine (colon or bowel) and rectum gets inflamed. This inflammation often starts in the rectum and lower (sigmoid) intestine. Then it spreads to the whole colon.

• Ultrafast CT Scan for Children
An ultrafast computed tomography (CT) scan is an imaging test that uses X-rays and a computer to look at your child’s heart. It gives the healthcare provider many details about your child’s heart that other imaging tests can’t.

• Umbilical Cord Care
In a few weeks, your baby will have the cutest little belly button. But right now the healing remains of his umbilical cord need special care. Here's how to make sure the cord remainder stays infection-free.

• Uncontrolled Blood Pressure? Maybe It's Time to Check Your Shins

• Understanding Cocaine and Crack
Cocaine use ranges from once in a while to nonstop. There is no safe way to use the drug.

• Understanding Eating Disorders
At least 8 million people in the U.S. are living with an eating disorder. Read on for a helpful overview of the 3 main types of eating disorders.

• Understanding the Teen Brain
Parents need to realize the rational part of a teen's brain isn't fully developed and won't be until he or she is 25 years old or so.

• Understanding Your Child's Lymphatic System
Detailed information on the lymphatic system.

• Undescended Testes in Children
Undescended testes is when one or both of the male testes have not passed down into the scrotal sac. This is a condition seen in some newborn baby boys.

• Undescended Testes Tied to Higher Risk of Cancer, Infertility

• Unfit Teens Often Grow Into Sickly Middle Age, Study Shows

• Unhealthy Diets May Be World's Biggest Killer

• Uniparental Disomy: Prader-Willi Syndrome, Angelman Syndrome
Detailed information on uniparental disomy

• Unlocking the Mysteries of Hair Growth

• Unraveling the Mystery of Hiccups

• Untangling the Ties Between Troubled Teens and Pot Use

• Unwrap the Gift of Toy Safety
Your challenge is to find toys that your children will enjoy and that you know are safe.

• Up to 1 Hour of General Anesthesia Safe for Infants: Study

• Upper Respiratory Disorders
Detailed information on the most common types of upper respiratory infections, including common cold, influenza, pharyngitis, tonsillitis, and sinusitis

• Ureterocele and Ureteral Duplication in Children
A ureterocele is when part of a ureter right near the bladder becomes larger and bulges. This happens because the ureter's opening into the bladder is too small and blocks urine flow.

• Urgent Care Centers Ease ER Burden in U.S.

• Urinary Incontinence (Enuresis) in Children
When wetting happens in a child who is old enough to control his or her bladder, it’s known as enuresis. Here's what you need to know.

• Urinary Tract Infection (UTI) in Children
A urinary tract infection (UTI) is inflammation of part of the system that takes urine out of the body. It's caused by bacteria.

• Urticaria (Hives) in Children
Hives is a sudden outbreak of red, itchy, and swollen areas on the skin. It often happens as an allergic reaction from eating certain foods or taking certain medicines. Here's what you should know.

• Use of 'Zombie' Drug Rare Among High School Seniors: Study

• Using Smartphones During Lectures = Lower Grades

• Uterus 'Scratching' Technique Won't Boost Fertility Treatment Success