YouTuber Simone Giertz became a viral sensation for investing her engineering skills into building hilarious “s**ty robots,” but she recently learned she had a brain tumour and required surgery.

The 27-year-old posted a video in May from the hospital where she was about to head into surgery to remove a tumour.

“I’m pretty scared,” Giertz said. “But that’s the healthy response to the prospect of having your skull cut open.”

RELATED: Irrfan Khan Reveals He Has Been Diagnosed With Tumour

Giertz explained the surgery was set to take eight to 12 hours. “I hope your day is more normal than mine,” she added.

I’m going in to surgery in a week. This is your eviction notice, Brian the Brain Tumor. Please remove your property from my skull, eyeball and jaw muscle. I’m also keeping your security deposit. — Simone Giertz (@SimoneGiertz) May 23, 2018

Someone close to Giertz offered an update on her condition via the YouTuber’s Twitter account. The tweet insisted she was doing well and noted her sense of humour was still intact after the surgery.

Simone is out of surgery and her doctors are very pleased with how everything went. She woke up long enough to make an inappropriate joke… so things are looking good. — Simone Giertz (@SimoneGiertz) May 31, 2018

In an emotional new social media post published Friday, Giertz apologized for her absence from social media.

“Sorry for the silence. I’m okay,” she tweeted. “Just not as okay as I’d like to be yet.”

Sorry for the silence. I’m okay. Just not as okay as I’d like to be yet. pic.twitter.com/yJYAbExprY — Simone Giertz (@SimoneGiertz) July 6, 2018

In a video published by Giertz last month she revealed the news that she had a brain tumour.

Giertz learned the swollen eyelid she suffered from for almost a year was caused by a benign brain tumour the size of a golfball.

“I don’t even like golf, but I do like my brain, a lot,” she said with her trademark deadpan humour. “The good news is that I’m probably not dying,” the Swedish personality expressed, although she will have to wait until after having surgery to be certain.

RELATED: Claire Foy’s Husband Opens Up About Devastating Brain Tumour

Giertz’s operation is scheduled for the end of May: “This is not a goodbye. I’m planning on becoming super-healthy, and being able to keep on building shitty robots and making videos for you.”

The robot-enthusiast first joined YouTube in 2013 and has amassed almost one million subscribers to date.