Health Library

Persistent Depressive Disorder in Children

Persistent depressive disorder is a type of depression. A child with this disorder has a low, sad, or irritable mood for at least 1 year.

Persistent Pulmonary Hypertension in the Newborn

Persistent pulmonary hypertension (PPHN) happens in newborn babies. It occurs when a newborn’s circulation continues to flow as it did while in the uterus. When this happens, too much blood flow bypasses the baby’s lungs. This is sometimes called persistent fetal circulation.

Pets and Infectious Diseases in Children

One way to prevent the spread of disease from your pet: Feed your pet a balanced diet. Don't give your pet raw foods or allow it to drink out of the toilet.

PFAPA Syndrome

PFAPA is a childhood syndrome that causes repeated episodes of fever, mouth sores, sore throat, and swollen lymph nodes. PFAPA usually starts in early childhood between ages 2 and 5.

Pharyngitis and Tonsillitis in Children

Pharyngitis is redness, pain, and swelling of the throat, and tonsillitis is inflammation of the tonsils. Learn more about these conditions in children, including causes, symptoms, and treatment.

Phenylketonuria (PKU) in Children

Phenylketonuria (PKU) is a rare metabolic disorder. Children with PKU can't process an amino acid called phenylalanine. Phenylalanine is in many common foods.

Pheochromocytoma in Children

Pheochromocytoma is a tumor of the adrenal glands. The tumor makes hormones called epinephrine and norepinephrine. This leads to an excess of the hormones in the body. These hormones help manage heart rate and blood pressure, and they have other tasks. Too much of these hormones in the body causes problems.

Phimosis and Paraphimosis in Children

Phimosis and paraphimosis are problems with the foreskin of the penis. Phimosis is when a foreskin can’t be pulled down (retracted) from the tip of the penis. Paraphimosis is when the foreskin is retracted but can’t move back up.

Phobias in Children

A phobia is an excessive fear of a certain object or situation. It's a fear that lasts for at least 6 months. It is a type of anxiety disorder. Here's what you need to know.

Phosphorus Restriction for Children

Detailed information on controlling phosphorus in your child's diet.

Physical Abnormalities

Detailed information on physical abnormalities of high-risk newborns

Physical Exam for a Child with Congenital Heart Disease

Detailed information on what to expect when your child has a physical exam to help find possible heart conditions, or to find out how well your child is coping with existing heart problems.