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Diabetes is a condition in which the body can't make enough insulin, or can't use insulin normally. Type 1 diabetes is an autoimmune disorder. ...

Cold sores are small blisters around the mouth caused by the herpes simplex virus. They are sometimes called fever blisters. ...

Cleft lip and palate are openings or splits in the upper lip or roof of the mouth (palate). A child can be born with a cleft lip, cleft palate, or both. ...

X-linked agammaglobulinemia is a rare genetic disease. It causes a weakened immune system. It is also known as Bruton's agammaglobulinemia. X-linked means that the gene that causes this disease is located on the X chromosome. It mainly affects boys, because they have only have one ...

Hyperparathyroidism is when the parathyroid glands make too much parathyroid hormone. The condition is rare in children. ...

Septic arthritis is an infection in the joint fluid (synovial fluid) and joint tissues. It occurs more often in children than in adults. The infection usually reaches the joints through the bloodstream. In some cases, joints may become infected because of an injection, surgery, or ...

Juvenile dermatomyositis (JDM) is a rare disease that causes muscle inflammation and a skin rash. It's different from other muscle diseases because it also causes skin problems. ...

Mumps is a very contagious viral illness that infects the pair of salivary glands in front of the ears. These are called the parotid glands. Symptoms of mumps include swelling in the throat and jaw. ...

Growth hormone (GH) deficiency is when the pituitary gland doesn't make enough growth hormone. GH is needed to stimulate growth of bone and other tissues. This condition can occur at any age. GH deficiency does not affect a child's intelligence. ...

When cellulitis occurs in the eyelid and tissues in the front part of the eye area, it’s called pre-septal cellulitis. When it occurs in tissues behind and around the eyeball (orbit), it’s called orbital cellulitis. Both of these conditions are serious. ...