Ariana Grande is sharing her battle with post-traumatic stress disorder.

The 25-year-old singer illustrated her struggle with the condition Thursday by posting a brain scan on Instagram Stories showing her high levels of PTSD.

Grande shared a screenshot of a group text message. She sent a photo of a normal brain scan, which was largely dark, a scan of a brain with PTSD, which had some highlighted areas, and her own scan, which was mainly light.

“hilarious and terrifying,” the star captioned the post. Later she apologized for freaking her fans out with the post.

In a note posted on her Instagram Story, Ari wrote, “Didn’t mean to startle anyone with my brain thingy. it just blew me away. i found it informative and interesting and wanted to encourage y’all to make sure you check on your brains/listen to your bodies/take care of yourselves, too.”

“i love science and seeing the physical reality of what’s going in there was incredible to me,” she continued. “i mean, i feel it all the time but seeing it is totally different and super cool.”

Grande said in the July issue of British Vogue she was experiencing “signs of PTSD” following the Manchester bombing in May 2017. A suicide bomber killed 22 people and wounded 139 at Grande’s concert at Manchester Arena in Great Britain.

“It’s hard to talk about because so many people have suffered such severe, tremendous loss. But, yeah, it’s a real thing,” the singer said. “I know those families and my fans, and everyone there experienced a tremendous amount of it as well.”

“Time is the biggest thing,” she added. “I feel like I shouldn’t even be talking about my own experience – like I shouldn’t even say anything. I don’t think I’ll ever know how to talk about it and not cry.”

Grande has been open about her mental health following the bombing as well as the death of ex-boyfriend Mac Miller in September.

Grande will return to Manchester in August to headline Manchester Pride. She last released the single “Monopoly” with Victoria Monét this month.

She is currently on her Sweetener international tour, and this weekend, she is set to become the youngest female artist to headline at Coachella.

In April, Grande released “No Tears Left to Cry,” the first song off her album Sweetener. At a concert Saturday, she teased another new track, “The Light Is Coming,” which will feature Nicki Minaj and is set to arrive June 20th.

Grande’s supporters have expressed concern for the 25-year-old on social media. Many are urging her to take time away from the spotlight to heal.