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Persistent Depressive Disorder in Children What is persistent depressive disorder in children? Persistent depressive disorder is a type of depression. Depression affects a child's body, mood, and thoughts. It can disturb eating, sleeping, or thinking patterns. It's not the same

Salmonella Infections What are salmonella infections? Salmonella infection is caused by the bacteria salmonella. Salmonella is a group of bacteria that can cause diarrhea in humans. There are many different kinds of salmonella bacteria. What causes salmonella infections

Heart Transplant for Children What is a heart transplant for a child? A heart transplant is surgery to replace a heart that isn't able to work the way it needs to with a healthy one. The healthy heart comes from an organ donor. Heart donors are adults or children who are

Treating Aged or Sun-Damaged Skin What is photoaging? Too much sun exposure can cause premature aging of your skin. This premature wrinkling and skin damage from sun exposure is called photoaging. Photoaging is not like natural aging. It causes: Coarse, dry skin. Freckling and

Pulmonary Atresia What is pulmonary atresia? Pulmonary atresia (PA) is a heart defect. It happens when the baby's heart doesn’t form as it should in the uterus. This can happen during the first 8 weeks of pregnancy. PA is a problem with the opening of the pulmonary valve. This

Ulcerative Colitis in Children What is 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

Anatomy and Function of the Urinary System How does the urinary system work? The body takes nutrients from food and changes them to energy. After the body has taken the food components that it needs, waste products are left behind in the bowel and in the blood. The kidney and

Fever in a Newborn Baby The system that controls body temperature is not well developed in a newborn baby. Call your baby's doctor right away if your baby is younger than 3 months old and has a rectal or forehead (temporal) temperature of 100.4°F (38°C) or higher. This is an

Helicobacter Pylori in Children What is H. pylori (Helicobacter pylori) in children? H. pylori is a spiral-shaped germ (bacteria) that infects the stomach. It can damage the tissue in your child's stomach and the first part of the small intestine (duodenum). This can cause

Pharyngitis and Tonsillitis in Children What are pharyngitis and tonsillitis in children? Pharyngitis is redness, pain, and swelling of the throat (pharynx). Tonsillitis is inflammation of the tonsils. The tonsils are a pair of tissue masses on both sides at the back of the