Transcript for Texas Woman Wakes From Surgery With British Accent

We turn to that bizarre story of a Texas woman who woke up from surgery with a thick british accent of the rare condition is called foreign accent syndrome and apparently there's no known cure. ABC's Mara schiavocampo is here with more on this. Hey, Mara. Hey, David, good morning. Imagine waking up from surgery sounding like a completely different person. At first this woman's doctor thought it was due to swelling, her kids thought she was faking it. But it's actually something very real. Mom of three Lisa Alamia is a born and bred Texas girl. I say you all the time before the accident once I got the accident I started to notice I said you are. Reporter: Is from England. It all started in December of 2015. She went in to surgery to fix an overbite and came out with a new british accent. I've never been outside of the country except for a mission trip to Mexico and that's definitely not where my accent came from. Reporter: Listen to her voice before in a video her family made for their church. You guys have inspired us and befriended us and we love you. Reporter: And today. I was very shocked. Very -- I didn't know how to take it. I was very confused. Reporter: So just how does something like this happen? It's an extremely rare medical condition called foreign accent syndrome. Only about 100 reported cases ever. Alamia's neurologist ran a full battery of tests but says everything came back Normal. To know that she's not faking it, not making this up gets just such a rare condition that even neurologists that I speak to don't believe that this is the real condition. Reporter: While the accent can die mennish over time it can also be permanent and there is no known cure. Now Alamia plans to start speech therapy but has a message that sounds great regardless of the accent. You're still you. This accent doesn't define you. You are who you are. Reporter: Now it's most often caused by trauma or stroke but her doctors will keep doing tests to get to the bottom of it. Part of the small 15% not due to head trauma. Doctors say it is a real thing and I was struck by what she said. She'd only ever traveled to Mexico. She hadn't even been exposed to the british accent. A woman from Kansas woke up with an Irish accent. So it can be an accent that you don't necessarily know is in you but it's in you. Fascinating. Does it wear off. It has gotten better over the last seven months but this may be as good as it gets. It may be like this for the rest of her life. Her kids are no longer scared because in Texas a british accent is not intimidating. She wants that back so the kids will listen. To Amy and the big board.

This transcript has been automatically generated and may not be 100% accurate.