What is aphasia?

apha•sia | uh-fey-zhuh

Aphasia is an acquired language disorder. It is often caused by a stroke or brain injury. It affects a person’s ability to process, use, and/or understand language. Aphasia does not affect intelligence.

What does aphasia affect?

Aphasia can affect all forms of language, including speaking, listening, reading, writing, and numbers/mathHaving aphasia can make it hard for someone to communicate or understand others.  

What causes aphasia?

Aphasia is caused by damage to the language centers of the brain. These are usually on the left side of the head (in the left hemisphere). There are many different events or conditions that can cause aphasia.

Most people with aphasia have had a stroke or a brain injury. But you can also have aphasia after surgery, due to a brain tumor, or due to an infection. Other people have aphasia due to progressive conditions, such as dementia, or other reasons.

Are there different types of aphasia?

There are many types of aphasia. What aphasia looks like for you will depend on where in your brain you have damage, as well as how much damage there is. The more severe the aphasia, the more limited your speech and language skills.

What can I do about aphasia?

Getting an aphasia diagnosis is unplanned, unexpected, and frustrating, but it is not hopeless. There are many resources, support groups, and educational tools available for people with aphasia and their care partners.  

Learn about aphasia

What is
aphasia?

Get a clear explanation of aphasia, what it affects, and why it can look different from person to person.

What causes
aphasia?

Explore the most common causes of aphasia and how brain changes can lead to communication challenges.

What are symptoms
of aphasia?

Find out what communication challenges people with aphasia face based on what type of aphasia they have.

What are the
types of aphasia?

Learn how aphasia is commonly grouped, what those patterns mean, and why no two experiences are exactly the same.

Diagnosis, recovery,
and prevention

Learn how aphasia is diagnosed, recovery outlook, and prevention tips.

Related
conditions

See which conditions may co-exist with aphasia and how they might affect you.

How is
aphasia treated?

Get more info on how professionals treat aphasia and how different treatments work.

Resources

Articles

Explore expert insights, practical guidance, and real-world perspectives on living with and understanding aphasia.

Webinars

Informative aphasia-focused webinars that support education, shared understanding, and informed decision-making.

Aphasia stories

Personal stories, short films, and perspectives that show how people live, adapt, and communicate with aphasia.

Community

Join In Aphasia is a free online community that brings people together to connect and support one another on their aphasia journey.