A preemie's immune system is less mature than a term baby's, which puts preemies at higher risk of developing an infection.

A hernia occurs when a section of bowel pushes out through a weakness in the muscle. The hernia looks like a bulge under the skin. In baby boys, a bulge in the scrotum is the most common type of hernia and is the result of a persistent canal between the scrotum and abdomen that normally closes when a fetus is developing. A hernia can move back into the abdomen through the passage. So you may not see the bulge all the time. You may see it most when your baby is straining (such as during crying, feeding, or a bowel movement).

When you have a baby, dirty diapers are a part of daily life. But changing diapers is more than just a chore. It's also a way to keep track of your baby's health. This sheet will help you know what's normal and what's not.

An ingrown nail is the result of a nail growing into the skin that surrounds it. This often occurs at either edge of the big toe. Ingrown nails may be caused by improper trimming, inherited nail deformities, injuries, fungal infections, or pressure.

A black-and-blue nail (also called a black nail) is usually caused by sudden or repetitive injury to a toe. If your toe is black and blue but not injured, see your healthcare provider immediately.

Stress urinary incontinence is a common type of bladder control problem in people who were assigned female at birth. Read on to learn more.

Although a hernia bulge may appear suddenly, hernias often take years to develop. They grow larger as pressure inside the body presses the intestines or other tissues out through a weak area in the abdominal wall, often at the belly button, or a site of previous surgery. With time, these tissues can bulge out beneath the skin.

A hernia won't heal on its own. You'll need surgery to fix the defect in the abdominal wall. Read on to learn what to expect before, during, and after surgery.

Idiopathic pulmonary fibrosis is a lung disease that causes inflammation and scarring in the air sacs (alveoli) of the lungs. This makes it harder to breathe.

Systemic lupus erythematosus is a disease that causes your body’s immune system to attack its own cells and tissues. It can affect your joints and nervous system. It can affect blood vessels. And it can affect organs, such as the skin, kidneys, lungs, and brain. It can cause rashes, fatigue, pain, and fever. Severe lupus can cause harm to organs and other serious problems, including death.