(LOS ANGELES) — Hailey Bieber is on the mend after experiencing stroke-like symptoms last week.

Over the weekend, the 25-year-old model told her fans what happened on her Instagram stories and said it was “one of the scariest moments I’ve ever been through.”

“On Thursday morning, I was sitting at breakfast with my husband when I started having stroke-like symptoms and was taken to the hospital,” Bieber wrote. “[The doctors] found I had suffered a very small blood clot to my brain, which caused a small lack of oxygen, but my body had passed it on its own and I recovered completely within a few hours.”

In the U.S., strokes are the fifth cause of death and leading cause of disability, according to the American Stroke Association. It occurs when a blood vessel that carries oxygen and nutrients to the brain is either “blocked by a clot or bursts.” Usually when this happens, the American Stroke Association says, part of the brain can’t get the blood and oxygen it needs.

Board-certified emergency medicine physician and ABC News contributor Dr. Darien Sutton said there are three types of strokes. He said he believes Bieber had a transient ischemic attack, or “mini-stroke.”

“That’s when blood supply is temporarily reduced,” Sutton said. “And that can cause symptoms lasting anywhere from minutes to up to 24 hours.”

What was perhaps most shocking in Bieber’s case was her age, as strokes usually occur in older adults.

“It’s incredibly uncommon for a patient who is young and healthy to present a stroke, as it predominantly occurs in those over the age of 60,” Sutton said. “But I will say, given the pandemic, we’ve seen increased rates of COVID-19 associated with cardiovascular disease as well as stroke.”

Last month, Nature published an article about a massive study in which researchers found that the rates of many conditions such as heart failure and stroke “were substantially higher in people who had recovered from COVID-19 than in similar people who hadn’t had the disease.”

The risk was elevated for those who were younger than 65 and lacked risk factors such as obesity or diabetes.

Bieber’s health scare comes one month after her husband, Justin Bieber, contracted COVID-19. The singer, who has since recovered from the disease, had to postpone multiple concert dates on his Justice World Tour, including a show in Las Vegas, which was later rescheduled to June.

While Bieber is now home and thankful for the care she received from doctors and nurses, Sutton said the model did the right thing and encourages people to take note of the signs and symptoms of stroke.

“We all know the typical symptoms of a stroke, which can include sudden numbness or weakness on one side of the body, but I want to help clarify some other important symptoms,” Sutton said, pointing out that other symptoms can include sudden changes in speech, sudden changes in vision, sudden severe headache or acute dizziness.

“If you have any of these symptoms, it’s important to get help,” Sutton added. “An important tip is to take note of the time. When you get to the emergency room, we ER doctors are going to want to know how long these symptoms have been going on, and it helps direct our clinical care.”

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(ORO-MEDONTE, Ontario) — When Chloe McKnight was born 15 months ago, she had what looked like a slight scratch on her forehead, according to her mom, Ashley McKnight.

As Chloe grew, the mark grew too, becoming more prominent and beginning to resemble a red stain on her forehead, according to McKnight, from Oro-Medonte, Ontario.

At less than 2 months old, Chloe was diagnosed with a hemangioma, a noncancerous tumor made up of extra blood vessels, according to the American Academy of Pediatrics.

Hemangiomas, sometimes known as baby birthmarks, are the most common benign tumors in infants, occurring in around 5% of all births in the United States, according to the AAP.

While most hemangiomas go away on their own, Chloe’s kept growing, according to McKnight.

“It didn’t look like it was reserving at all and it just gradually got larger and larger,” she said. “At first it was just really flat and red, and then it started to grow in height.”

McKnight, also mom to two sons ages 3 and 5, said she extended her maternity leave out of concern for Chloe’s safety.

“It’s basically a tumor of blood vessels that would bleed if she were to bump it,” said McKnight. “Always that was in the back of our minds, just making sure that she never hit it or anything.”

As the tumor grew, McKnight said she and her husband and Chloe’s brothers treated it as just part of Chloe, touching it and kissing it, but acknowledged that it drew attention in public.

“If you were going out, you would always be reminded of it because people would obviously look up and be curious and wonder what it is,” she said, adding that the coronavirus pandemic helped the family to be in their “own little bubble” at home.

As Chloe got older and the tumor continued to grow, McKnight said she and her husband searched for a surgeon who could remove the tumor with as little damage as possible to Chloe’s face.

Through a Facebook group for parents of children with hemangiomas, the McKnights met Dr. Gregory Levitin, director of vascular birthmarks and malformations at New York Eye and Ear Infirmary of Mount Sinai in New York City.

Levitin described Chloe’s tumor as “unusually large” and one for which “there is no textbook” when it comes to operating.

“When I get these large ones, to have one on the forehead skin is an incredibly challenging area because you don’t have a lot of extra tissue to borrow from,” he said. “It acts like a cancer in the sense that it invades and takes up valuable tissue in the face.”

In January, Chloe and McKnight traveled to New York City for Chloe to undergo surgery.

Levitin removed Chloe’s tumor in a three-hour surgery in which he focused on not only controlling the blood vessels in the tumor, but also making sure her face appeared the same after surgery.

“[The tumor] dropped and touched the muscle of the forehead, so preserving the muscle and allowing her to have facial expressions was important,” said Levitin. “We wanted the shortest scar possible and so finding ways to manipulate the tissue to get the shortest scar possible was equally important.”

Levitin was able to successfully remove Chloe’s hemangioma and the recovery has been surprisingly easy, according to McKnight.

“I feel like she had a harder time with teething pain than with this whole process,” said McKnight. “It made me realize how resilient children are.”

While the swelling on Chloe’s forehead will take more months to go down, the toddler is even more active than before surgery, according to McKnight.

“She’s go, go, go all the time,” she said. “She was just herself and off to the races.”

Levitin said he often sees a transformation like that in patients because hemangiomas can be unknowingly taxing as they take up energy stores in the body.

“They take up a lot of blood volume and, in doing so, process a lot of the blood and nutrients,” he said. “I hear many stories about parents who feel within 24 hours that there’s been a transformation in their children’s behavior and energy.”

Levitin described it as “incredibly rewarding” to be able to make such an impact on a child.

“It’s an incredibly rewarding part of my job when I can take a child from a mother’s arms and return her back to that mother’s arms afterwards completely changed and with an appearance which is how she was first born, and now how she’ll live for the rest of her life,” he said.

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