Frequent infections could mean that you have an immune system disorder. The conditions in this category are usually caused by genetic changes.
Disease
Stye (sty)
This is a painful bump along the eyelash line that can often be treated with home remedies. Find out more about this irritating eyelid infection.
Disease
Knee pain
Learn about this common complaint, which can result from an injury or medical condition, and find out which treatments may help.
Disease
Meningioma
This is the most common type of tumor that forms in the head and may affect the brain. Find out about symptoms, diagnosis and treatment.
Disease
Congenital diaphragmatic hernia (CDH)
In CDH, a baby's diaphragm — the muscle that separates the chest from the abdomen — develops a hole called a hernia. Learn about treatment before birth.
Disease
Achalasia
In this condition, the muscles in the esophagus don't relax, preventing food and drink from moving into the stomach. Learn more about this rare digestive disorder.
Disease
Respiratory syncytial virus (RSV)
This common illness affects the lungs. It can seem like a cold, but may be severe, especially in children. Know the symptoms and treatment.
Disease
Occupational asthma
Dust, fumes and other substances at work can cause asthma. Find out how to recognize this common type of asthma.
Disease
Wet macular degeneration
Blurred vision or blind spots could be a sign of this eye disorder. Recognizing the warning signs could save your vision.
Disease
Legionnaires' disease
Bacteria that can live in water from air conditioning systems, showers and spas cause this severe form of pneumonia.
Disease
Constipation
Learn how to prevent and treat infrequent or painful passing of stool.
Disease
Frontotemporal dementia
Read more about this less common type of dementia that can lead to personality changes and trouble with speech and movement.