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Common Breast Conditions Click on the links below to learn about common breast conditions. Mastalgia (Breast Pain) Common Benign Lumps Fibrocystic Breast Changes Nipple Problems and Discharge Breast Infections and Inflammations Diagnosing Benign Breast Conditions© 2000-2025 The

GERD (Gastroesophageal Reflux Disease) in Children What is GERD in children? GERD (gastroesophageal reflux disease) is a long-term (chronic) digestive disorder. It happens when stomach contents flow back up (reflux) into the food pipe (esophagus) and cause symptoms or problems

What Are Red Blood Cells? Red blood cells carry fresh oxygen all over the body. This is important to your health. Red blood cells are round with a flattish, indented center, like doughnuts without a hole. Your healthcare provider can check on the size, shape, and health of your

Allergens: Dust and Dust Mites What are dust allergens? Dust allergens are substances found in dust. They may include: Fabric fibers Lint Feathers Stuffing materials Animal protein (dander, saliva, urine, and body oils) Bacteria Mold and fungus spores Food particles Plants

Calculating a Due Date A typical pregnancy lasts, on average, 280 days, or 40 weeks—starting with the first day of the last normal menstrual period as day 1. An estimated due date can be calculated by following steps 1 through 3: First, determine the first day of your last

Brain Tumors in Children What are brain tumors in children? 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 cord. The main parts of the brain are: Cerebrum. This is the front of

Stroke What is a stroke? A stroke, or brain attack, happens when blood flow to your brain is stopped. It's an emergency situation. Call 911 if you think you might be having a stroke or stroke symptoms. The brain needs a constant supply of oxygen and nutrients to work well. If the

Allergens: Animals What is an animal allergen? Allergens found in animals are a common cause of allergic reactions. They are caused by the proteins found in an animal's: Skin (dander) Saliva Urine Household pets such as cats and dogs are the most common sources of animal

Cold vs. Allergy in Children: How to Tell the Difference Colds are infections of the upper respiratory tract (sinuses, nasal passages, throat, and larynx). They are caused by several different viruses. They are spread by: Touching a person with a cold, such as shaking hands, and

Cystic Fibrosis Overview What is cystic fibrosis? Cystic fibrosis (CF) is an inherited disease of the glands that make mucus and sweat. People with CF get a defective gene from both parents. People who have one defective gene from one parent are called carriers. They don't have