TikTok star Taylor Rousseau Grigg's cause of death revealed by family

TikTok star Taylor Rousseau Grigg's cause of death has been revealed — less than a week after her 'sudden and unexpected' passing on Friday, October 4.

Grigg's family confirmed to TODAY on Thursday that the 25-year-old influencer died as a result of complications related to Addison's disease and asthma.

Months before her death, Griggs confessed to her followers that she'd been struggling with a mystery illness since August 2023. 

Addison's disease is a rare disorder that occurs when the adrenal glands no longer produce enough of the hormones cortisol and aldosterone, as per the Mayo Clinic.

Adrenal insufficiency can be life-threatening and symptoms — which includes extreme fatigue, weight loss and low blood pressure — may develop slowly or rapidly.

This is no cure for Addison's disease but sufferers typically take replacement hormones to treat the chronic condition.

Asthma is a chronic lung disease that causes narrowing and inflammation of the airways, making it difficult to breathe.

Days after her death, a haunting video of Griggs addressing her declining health months resurfaced online. It was filmed less than two months before her shock death at age 25.

In the August 8 video, tshe responded to claims from fans that she didn't appear as happy as she used to be before marrying Cameron Grigg, a rodeo bull rider. 

This is when she revealed she got sick shortly after marrying Cameron, whom she called a 'great husband' and 'the best thing that ever happened to me.' 

Even so, she defended herself, saying she wasn't always required to put on a happy face for her 1.4 million followers before her tragic death last weekend.

She also explained that even though she had been sick with the unknown illness since last August, she didn't truly know what was wrong with her until sometime this year. This meant months and months of uncertainty and terror, she said.

'Stress is what did this to me, or one of the things that did this to me,' Taylor said in the heartbreaking video. 'You're seeing me be sick for the whole time that we're married and me not finding out what was wrong until this year...so I was just struggling that whole time feeling like I was going to die.'

Cameron announced Taylor's death on Instagram Saturday, but didn't disclose how she died.

'This past year Taylor has dealt with more pain and suffering than most people do in a lifetime. And in spite of that she still has been such a light and always brought joy to everyone around her,' Cameron wrote.

The 24-year-old avid hunter added: 'She's no longer in pain, but her body has been made whole in Jesus' name. We can praise God that she will endure no more suffering and she is truly set free from these earthly chains! She's been made whole and perfect! I cling to the fact of knowing that we will be seeing her again! And we will be able to spend all of eternity together!'

Cameron has set up a GoFundMe to cover hospital and funeral costs, which has already amassed $40,579 towards a $100,000 goal.

Lauri Rousseau, Taylor's mother, told DailyMail.com that her daughter never told her audience precisely what illness she had in part because she was hoping for a miracle.

'She was waiting for a miracle,' Lauri said. 'Unfortunately, her miracle is to be with Jesus.'

Taylor said in the August 8 video she didn't want to be specific with her diagnosis because she didn't want to be bombarded with advice and fake cures.

'In the past, I've caught myself doing stuff because people on the internet told me I have to be this way or I have to do this,' she said. 'I'm done doing that.'

Taylor was more up front with her audience than ever in the video, revealing the pain she was enduring.

'I feel like I'm fighting for life every day, and when I didn't know what was wrong with me, I would be in bed writhing in pain just wishing to be dead,' she said through tears. 'I just wanted it to end, and I don't necessarily feel that way now.'

She added: 'And it just sucks, because I'm 24 years old. I should be in my prime! I should be able to carry my suitcase up the stairs. I should be able to walk to the mailbox or run. And those are just things that I can't really do right now.'

Taylor posted a video on September 4 announcing that she was set to turn 25. In it, she lip-syncs the words, 'Don't worry about it, everything's gonna be fine.'

This video in particular got a lot of attention from her fans, who flooded the comments to memorialize her.

'Forever 25 beautiful angel,' one person wrote.

'It’s crazy how much someone you’ve never met can have such an impact on your life...Rest easy Tay,' another wrote.

'Her coming across my FYP after she left the world...' a third wrote.

In another August video she captioned 'Daily Thoughts' - Taylor again talked about comments from people saying she wasn't the same person after her illness.

'No, I'm the same person. I'm not different at all,' she said. 'I think the biggest change for me personally is that in the past, you guys have seen me in constant fight or flight mode, which is exactly what the doctor told me.'

This 'fight or flight' mode and being stressed all the time, she said, is what 'kicked off the beginning of my condition.'

March 16 was the day the Geaux Sauvage founder revealed she'd been hospitalized and put on a V60 ventilator 'after a lifetime of battles [and] near death experiences.'

After Taylor's death, her older sister Bailey Wagner shared an Instagram slideshow vowing to carry on her legacy: 'From holding you when you came home from the hospital for the first time to holding you when you left the hospital for the last time... and holding you all the times in between. My beautiful baby girl, I'm just not ready to let go.'

Rousseau's final TikTok post on September 26 was dedicated to taking her beloved Pit Bull, Baby, to the veterinarian.

The Texan native - who also owned Sauvage Lashes - is also survived by her younger sister Trinity Rousseau.