Riley Horner, from Kirkland, Illinois, suffered a traumatic head injury that doctors originally deemed a concussion. After dozens of seizures and numerous visits to the hospital, Riley continues to suffer from short-term memory loss.

Riley said that she keeps detailed notes of events happening throughout the day, and sets an alarm on her phone every two hours to remind her to review them.

Her mother told WGN9 that she researched that short term memory can indicate irreversible brain damage if it lasts more than six months, and the Horners hope to find an answer before it is too late.

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On June 11, an Illinois teen was accidentally kicked in the head, inducing memory loss and dozens of seizures. Months later, she believes that it is still June 11.

Riley Horner, from Kirkland, Illinois, suffered a traumatic head injury that doctors originally deemed a concussion, WGN9 reported.

"I'm very confused, and I try to think back, but I can't," Riley told WGN9. "... I'm not making memories, and I'm just, like, really scared."

Riley said that she keeps detailed notes of events happening throughout the day, and sets an alarm on her phone every two hours to remind her to review them. She also keeps a calendar in her room to remind her what day it is, as she wakes up every morning confused, thinking that it is still the day that changed everything for her.

Sarah Horner, her mother, told WGN9 that Sarah's brother had recently passed away, and she has to break the news to Riley every day.

"We tell her every day but she doesn't have an idea, no idea about it," Sarah told the news outlet.

Read more: A new book tells the story of what it's like to lose your short-term memory at the age of 33

Even though Riley's memory "resets," she said she does recognize the hardship that it places upon her family and others who support her.

"I know it's hard for them as much as it's hard for me," Riley told WGN9.

However, her condition remains a medical mystery as doctors can't pinpoint what exactly is wrong, according to her mother, Sarah Horner.

"They tell us there's nothing medically wrong. They can't see anything," Sarah told WGN9. "You can't see a concussion on an MRI or a CT scan. There's no brain bleed; there's no tumor."

Her mother told WGN9 that she researched that short term memory can indicate irreversible brain damage if it lasts more than six months. Both Sarah and Riley hope to find an answer before it becomes too late.

"We need help; we need somebody that knows a little bit more because she deserves better," Sarah told WGN9. "I mean, [Riley] wanted to be in the medical field, and now she can't even hold a job if she wanted to."