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Color Blindness What is color blindness? Color blindness is when you see colors differently than most people do. The retina is the light-sensitive lining in the back part of your eye. It sends visual information to your brain. Your retina has special cells that detect color

Dehydration What is dehydration? Dehydration means that you don’t have enough water in your body. The human body normally contains a lot of water. In fact, 50% to 60% of your body weight comes from water. It helps keep your body healthy and working well. Mild dehydration can

Warts in Children What are skin warts in children? Warts on the skin are small, noncancerous skin growths. They are caused by a virus. Warts can spread to other parts of the body and to other people. What causes skin warts in a child? Warts are caused by a type of human

Epilepsy and Seizures in Children What is epilepsy in children? Epilepsy is a brain condition that causes a child to have recurring seizures over time. These seizures can't be linked to a short-term (acute) illness such as an infection or a short-term injury such as a brain

Asthma in Children What is asthma in children? Asthma is a long-term (chronic) lung disease that causes your child's airways to become sensitive to certain things (triggers). Several things happen to the airways when a child is exposed to triggers: The lining around the airways

Craniopharyngioma in Children What is craniopharyngioma in children? Craniopharyngioma is a brain tumor that’s not cancer (benign). A brain tumor is an abnormal growth of tissue in the brain. The brain is part of the central nervous system (CNS). The CNS also includes the spinal

Dementia with Lewy Bodies (DLB) What is dementia with Lewy bodies? Dementia with Lewy bodies (DLB) is a form of progressive dementia. It's caused by the decay of the tissues in the brain. People with DLB have a buildup of abnormal protein particles in their brain tissue, called

Premenstrual Syndrome (PMS) What is premenstrual syndrome (PMS)? Premenstrual syndrome or PMS is a group of physical and emotional symptoms many people may have in the days before their period starts. Symptoms usually stop when the period starts or shortly after. It’s thought to

Scleroderma in Children What is scleroderma in children? Scleroderma is an ongoing (chronic) disease that causes abnormal growth of connective tissue. It can affect the joints, skin, cartilage, and internal organs. It is a rare degenerative disease and gets worse over time. There

Alagille Syndrome What is Alagille syndrome? Alagille syndrome is an inherited condition in which bile builds up in the liver because there are too few bile ducts to drain the bile. This results in liver damage. Your liver makes bile to help remove waste from your body. Bile also