A broken bone or dislocated joint can block blood flow to the bone, causing bone tissue to die.
Disease
Childhood obesity
This complex disease involves having excess body fat early in life, and it can lead to health troubles later. Learn how to protect your child's health.
Disease
Double-outlet right ventricle
In this heart condition present at birth, two major blood vessels aren't attached to the heart in the usual positions. Learn how it's treated.
Disease
Hyperoxaluria and oxalosis
Learn about symptoms, causes, diagnosis and treatment for these rare kidney problems.
Disease
Hyperthyroidism (overactive thyroid)
Understand what happens when your thyroid is overactive and learn about treatment for this condition.
Disease
Intestinal obstruction
A blocked intestine needs prompt medical care. Learn about symptoms and the wide range of causes for this serious but treatable digestive disorder.
Disease
Medication overuse headaches
Using medicines that ease headache pain too often can start causing headaches. Learn about prevention and treatment.
Learn about the symptoms, diagnosis and treatments for this autoimmune disease that attacks nerve fibers in the body.
Disease
Neuromyelitis optica
Understand more about this condition that affects the spinal cord and eye nerves and is sometimes mistaken for multiple sclerosis.
Disease
Obesity
Obesity isn't just a cosmetic concern. It is a medical problem that increases the risk of heart disease, diabetes and certain cancers.
Disease
Obsessive-compulsive disorder (OCD)
OCD features unwanted thoughts and fears, or obsessions. These obsessions lead to repetitive behaviors, also known as compulsions, that get in the way of daily activities.
Disease
Obstructive sleep apnea
Learn the signs that point to this common and potentially serious sleep disorder. And find out the treatments that can help you sleep better.