Girl, 9, Receives Rare Diagnosis While Recovering from the Flu. Now, Her Mom Is Warning Parents About the ‘Scary’ Complication

A Michigan mother says she thought her 9-year-old daughter was finally “turning a corner” after coming down with the flu — until the little girl suddenly couldn’t walk and was diagnosed with a rare complication.

Ashley Geuther’s daughter, Tori, first developed classic flu symptoms: a high fever, chills and extreme fatigue, according to Newsweek. Ashley, 35, said she focused on keeping Tori comfortable, making sure she rested and stayed hydrated while closely watching her symptoms.

After a few days, Tori’s fever broke and Ashley believed her child was on the road to recovery. Then, things changed.

“Out of nowhere, she started saying her legs hurt really badly,” Ashley recalled. The pain began in Tori’s thighs and later spread down into her calves. Because Tori was still getting over the flu, Ashley initially assumed it was normal soreness from the virus and nothing more serious.

Before long, though, the pain became so severe that Tori said she couldn’t stand, telling her mom that her legs felt too weak to hold her up, Ashley told Newsweek.

Concerned, Ashley took Tori to a walk-in clinic. There, doctors weren’t alarmed and suggested that Tori simply needed more rest and fluids at home.

But by the next morning, it was clear something was very wrong. When Tori tried to get out of bed, Ashley says she “took one step and dropped straight to the floor” because the pain in her legs and feet was unbearable when she put weight on them.

“That was the moment I knew this was serious,” Ashley said.

Ashley rushed her daughter to the emergency room, where medical staff ordered tests, including bloodwork and a urinalysis. Soon after, Tori was diagnosed with benign acute childhood myositis (BACM), a rare condition that typically appears in children after a viral infection such as the flu.

According to the National Institutes of Health, BACM is marked by localized muscle pain — often in the calves — that follows an upper respiratory viral illness. The condition usually resolves on its own within about a week, but because it’s not widely recognized, it can be mistaken for more severe disorders.

In Tori’s case, she spent a week in the hospital, where she was carefully monitored and treated with IV fluids and pain medication. By the end of her stay, she had fully recovered and was able to walk normally again.

Ashley told Newsweek that the diagnosis took her completely by surprise. She said she had never heard of BACM before and had no idea the flu could lead to that kind of complication. The experience, she added, was frightening and completely unexpected.

Now, Ashley is speaking out to help other parents recognize potential warning signs. In a TikTok video that has since gone viral, she shared a clip of Tori walking cautiously on her toes around her hospital room while holding on to a wheeled cart for support.

In the caption, Ashley urged caregivers to stay alert during flu season: as infections spread, it’s important to pay close attention to any unusual or sudden changes in children’s pain or mobility and take them seriously.

Ashley also described what led up to Tori’s diagnosis and hospital stay, emphasizing how quickly things escalated from “getting better” to an emergency. She ended her message with a hopeful update: after a week, Tori made a full recovery and could walk again without pain. Ashley says she’s sharing their story so other families know what to look out for — and feel empowered to seek help if something doesn’t seem right.

“Listen to your kids when they say something hurts, even if it sounds strange,” she told Newsweek. “Trust your instincts — you know your child better than anyone.”