Aphasia is a language disorder that happens when you have brain damage. Your brain has two halves. Language skills are in the left half of the brain in most people. Damage on that side of your brain may lead to language problems. Damage on the right side of your brain may cause other problems, like poor attention or memory.
Aphasia may make it hard for you to understand, speak, read, or write. It does not make you less smart or cause problems with the way you think. Brain damage can also cause other problems along with aphasia. You may have muscle weakness in your mouth, called dysarthria . You may have trouble getting the muscles of your mouth to move the right way to say words, called apraxia . You can also have swallowing problems, called dysphagia. —American Speech-Language-Hearing Association