Conditions and Treatments

Adrenal Insufficiency (Addison Disease)

Adrenal insufficiency is a disorder that occurs when the adrenal glands don't make enough of the hormone cortisol. This hormone controls blood pressure and affects how your immune system works.

Acute Spinal Cord Injury

A traumatic injury to the spine can cause a bruise, a partial tear, or a complete tear in the spinal cord. Read on for details about causes, symptoms, treatment, prevention, and management.

Allergic Rhinitis in Children

Allergic rhinitis can happen on a seasonal basis or year-round. There is often a family history of allergic rhinitis, eczema, asthma, or food allergy. Read on to learn details about treating and managing this condition.

Acoustic neuroma is a rare noncancer tumor. It affects hearing and balance when the tumor presses on the nerves in the inner ear.

Avascular Necrosis

Avascular necrosis develops when blood supply to a bone is cut off. This causes the bone to die and can cause pain and joint problems.

Autistic Spectrum Disorder

Autism spectrum disorder is a neurological and developmental disorder that usually appears during the first three years of life.

Autoimmune Hepatitis

Autoimmune hepatitis is when your body’s infection-fighting system (immune system) attacks your liver cells. This causes redness and swelling (inflammation) and liver damage.

Attention-Deficit/Hyperactivity Disorder (ADHD) in Children

Attention-deficit/hyperactivity disorder (ADHD) is a brain-based, or neurodevelopmental, disorder. It is often first diagnosed in childhood.

Atrial Fibrillation

Atrial fibrillation, or AFib, is a kind of abnormal heart rhythm or arrhythmia. AFib increases the risk for blood clots. These clots can then travel to the brain, causing a stroke. This is why AFib significantly increases the risk for stroke.

Atopic Dermatitis

Atopic dermatitis is a chronic skin disorder. It is also called eczema. It often affects infants and may last until adulthood. It causes itchy, scaly patches on the skin.