Aphasia is a communication disorder that affects a person's ability to speak, understand, read or write language. It can range from difficulty finding words to being completely unable to communicate. It is often caused by damage to the left side of the brain, most commonly from a stroke or head injury. While it impacts language skills, intelligence remains intact. People with aphasia may struggle with pronouncing words correctly, reading, writing and putting sentences together. Technology and home exercises using computers and websites can help aphasics improve skills lost due to their condition.