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Poison Ivy Rash in Children What is poison ivy rash? Poison ivy rash is an itchy, allergic reaction to poison ivy. Poison ivy is a very common plant in the U.S. It's similar to two other plants called poison oak and poison sumac. The plants cause allergic dermatitis. This means

Whooping Cough (Pertussis) in Adults What is whooping cough (pertussis)? Whooping cough (pertussis) is a very contagious respiratory illness. It mainly affects babies and young children, but adults can also get it. Whooping cough caused thousands of deaths in the 1930s and 1940s

Substance Use Disorder or Dependence What is substance use disorder or dependence? Substance use disorder (SUD) Substance use disorder (SUD) is a recognized health condition. It refers to the use of illegal or legal substances in a harmful way. Alcohol is the most commonly used

Common Cold in Children What is the common cold in children? The common cold (upper respiratory infection) is one of the most common illnesses in children. Each year it leads to more healthcare provider visits and missed days from school and work than any other illness. Millions

Lymphadenopathy in Children What is lymphadenopathy in children? Lymphadenopathy means swelling of the lymph nodes or glands. These are the bean-shaped glands in the neck, armpits, groin, chest, and abdomen. These glands act as filters for lymphatic fluid. This fluid contains

Chickenpox What is chickenpox? Chickenpox is a common childhood disease. It causes an itchy, blistering rash and is easily spread to others. Until the varicella vaccine for chickenpox became available in 1995, chickenpox infection was very common. Almost everyone had been

HIV AIDS What is HIV/AIDS? The term AIDS refers to the most advanced stages of an infection caused by the human immunodeficiency virus (HIV). The current definition of AIDS includes: All HIV-infected people who have fewer than 200 CD4+ T cells (also called T4 cells). These cells

Tuberculosis (TB) in Children What is tuberculosis in children? Tuberculosis (TB) is an ongoing (chronic) infection caused by bacteria. It usually infects the lungs. But other organs such as the kidneys, spine, or brain may be affected. TB is most often spread through droplets

Peyronie Disease What is Peyronie disease? Peyronie disease causes hard, flat plaque to form under the skin on the tissue of the penis. The plaque often starts as an inflammation that may turn into scar tissue. The plaque builds up inside the penis in the thick elastic membrane

Constipation in Children What is constipation in children? Constipation is when a child has very hard stools and has fewer bowel movements than normal. It is a very common gastrointestinal (GI) problem. Signs that a child has constipation include: Having fewer bowel movements