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Seasonal Affective Disorder or SAD What is seasonal affective disorder? Seasonal affective disorder (SAD) is a type of depression. It happens during certain seasons of the year, most often fall or winter. It is thought that shorter days and less daylight may set off a chemical

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

Learning Disorders in Children What is a learning disorder in children? A learning disorder is when a child has trouble learning in certain school subjects. Your child may have problems with reading, math, or writing. Skills are below what's expected for the child's age, grade

Toxic Shock Syndrome (TSS) What is toxic shock syndrome? Toxic shock syndrome (TSS) is an illness that produces symptoms in many systems of the body. Certain bacterial infections release toxins into the bloodstream. These toxins can spread to many body organs. This can cause

Sunburn What is sunburn? Sunburn is a red, painful skin reaction that happens after too much exposure to ultraviolet (UV) light. UV light is a type of radiation in sunlight. The symptoms of a sunburn most often appear a few hours after sun exposure. They are often worst at 6 to

Menstrual Cramps (Dysmenorrhea) in Teens What are menstrual cramps in teens? Menstrual cramps are severe, painful cramps that occur during a period. There are two types: Primary. This type starts soon after the first menstrual period. It's usually lifelong. But it may get better

Urinary Tract Infection (UTI) in Children What is a urinary tract infection (UTI) in children? A urinary tract infection is inflammation of part of the system that takes urine out of the body. It’s caused by bacteria. The urinary tract includes the 2 kidneys. They remove liquid

Varicose Veins What are varicose veins? Varicose veins are enlarged, twisted veins. They can happen anywhere in the body. But they are more common in the legs. Varicose veins are not considered a serious health problem. But they can be uncomfortable and can lead to more serious

Respiratory Syncytial Virus (RSV) in Children What is respiratory syncytial virus (RSV) in children? RSV is a viral illness that causes symptoms such as trouble breathing. It's the most common cause of inflammation of the small airways in the lungs (bronchiolitis) and pneumonia

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 doctor visits and missed days from school and work than any other illness. Millions of people in