Health Topics A-Z

Aphasia is a disorder that results from damage (usually from a stroke or traumatic brain injury) to areas of the brain that are responsible for language. For most people, this damage happens in the left side of the brain. Aphasia impairs the expression and understanding of language, as well as reading and writing.

Arsenic is a naturally occurring, semi-metallic element found in water, air, food, and soil. When taken into the body, it can cause serious harm to human health.

Arthritis is a broad term referring to conditions that lead to joint inflammation.

Atopic dermatitis, commonly known as eczema, is a chronic inflammatory skin disease that primarily causes itching and can also cause other symptoms.

Attention-deficit/hyperactivity disorder (ADHD) is a developmental disorder marked by persistent patterns of inattention, hyperactivity, and impulsivity that can interfere with daily functioning and development.

Autism spectrum disorder (ASD) is a neurological and developmental disorder that affects how people interact with others, communicate, learn, and behave. Although autism can be a lifelong disorder, treatments, services, and support can improve a person’s health, well-being, and daily functioning.