Oppositional defiant disorder (ODD) is a type of behavior disorder. It is mostly diagnosed in childhood. Children with ODD are uncooperative, defiant, and hostile toward peers, parents, teachers, and other authority figures.

Sinusitis is an infection of the sinuses. These infections usually happen after a cold or with allergies. Here's what you need to know.

Swimmer’s ear (otitis externa) is an inflammation of the external ear canal. Swimmer’s ear is caused by bacteria or fungi. Water that stays in the ear canal during swimming, for instance, may let bacteria and fungi grow.

A nosebleed is bleeding from tissues inside the nose (nasal mucus membranes) caused by a broken blood vessel. Most nosebleeds in children occur in the front part of the nose close to the nostrils.

Premature babies who get breastmilk develop better eyesight. They also often do better on intelligence tests as they grow older.

Your milk is best, but it's not always complete with the nutritional needs of very small premature babies or some very sick newborns.

Human blood consists of about 22% solids and 78% water. The components of blood are plasma, fat globules, chemicals, and gases.

Hemophilia is an inherited bleeding disorder. People with hemophilia can’t stop bleeding because they don’t have enough clotting factor in their blood. Clotting factors are needed for blood to clot. Blood clots to prevent excessive bleeding.

Scoliosis is a deformity of the backbone (spine). It's when the spine has a side-to-side curve. The curve of the spine measures 10° or more.

Constipation is when a child has very hard stools and has fewer bowel movements than normal. It is a very common gastrointestinal (GI) problem.