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Cataracts in Children What are cataracts in children? A cataract is a clouding of the eye's lens. The lens is normally clear (transparent). Cataracts keep light rays from passing through the lens and focusing on the retina. The retina is the thin layer of nerve tissue that lines

Fever What is a fever? A fever is a body temperature that is higher than normal. It often means there is an abnormal process occurring in the body. Exercise, hot weather, inflammation, infection, vaccines, and many other things can make body temperature rise. What causes a fever

Ataxia Telangiectasia (A-T) What is ataxia telangiectasia (A-T)? Ataxia telangiectasia is a rare childhood disease that affects the nervous system, immune system, and other body systems. It is an inherited disease. The symptoms of A-T often begin to show up by age 5. How to say

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

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

Shingles What is shingles? Shingles (herpes zoster) is a common infection of the nerves. It is caused by a virus. Shingles set off a painful rash or small blisters on an area of skin. It can appear anywhere on the body, but it typically appears on only one side of the face or

Low Back Pain What is low back pain? Low back pain can range from mild, dull, annoying pain, to persistent, severe, disabling pain in the lower back. Pain in the lower back can restrict mobility and interfere with normal functioning. What causes low back pain? The exact cause of

Vascular Malformations and Hemangiomas What are hemangiomas and vascular malformations? Hemangiomas Hemangiomas are growths of blood vessels. They’re also called birthmarks. But they often can't be seen at birth. They usually form in the first few weeks of life. These growths

Ureterocele and Ureteral Duplication in Children What is a ureterocele and ureteral duplication in children? A ureterocele is a problem with a ureter. The ureter is a tube that connects the kidney to the bladder. There is 1 ureter for each kidney. The ureters send urine from the

Rheumatic Fever What is rheumatic fever? Rheumatic fever is a complex disease that affects the joints, skin, heart, blood vessels, and brain. It occurs mainly in children between the ages of 5 to 15. It's an autoimmune disease that occurs after an infection with strep