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How much do you know about the liver? Read on to learn about this vital organ and its many important jobs.

When you have loss of sensation, you're more likely to hurt yourself and not know it. Learn how to protect your health and reduce your risk of injury.

This test measures the amount of trypsinogen in the blood. Trypsinogen is made by the pancreas to help with digestion.

Tinea versicolor is a fungal skin infection. It’s caused by yeast on the skin. It occurs most often in teens and young adults. But it can happen at any time.

Puberty that happens early is called precocious puberty. This means a child's physical signs of sexual maturity develop too soon. This includes breast growth, pubic hair, and voice changes. These are known as secondary sexual characteristics. Precocious puberty happens before age 8 in girls, and before age 9 in boys.

Antiphospholipid syndrome is an autoimmune disease. This happens when your immune system fights against normal cells. In this condition, your body makes antibodies that attack a kind of fat in cells. This makes your blood clot too easily.

Whooping cough (pertussis) is a contagious illness. It causes intense fits (paroxysms) of coughing. It mainly affects babies and young children.

Choking hazards in the home: round, firm foods, such as grapes and popcorn, and small nonfood items, such as coins, balloons, and marbles.

From babies to teens, a look at how children understand death.