Marilyn Manson collapsed during his Houston, Texas gig, and was forced to cancel the show after just half an hour.
The singer allegedly told the crowd he was suffering heat poisoning, before leaving the stage and seeking treatment.
One Twitter user claimed he was only on stage for half an hour and managed just five songs, calling the show off after collapsing during Sweet Dreams.
They wrote: He played 5 songs and spent 3 of them on the floor and the last one he was leaning on the podium he has and he threw the mic and left, didnt even play the good songs.
Another added that he was put in a wheelchair as he came off stage and that he was seen vomiting.
Houston Press reports there were long breaks between songs as the singer tried to battle his way though, and that he was mostly stationary and visibly shaking at times.
They added: Upon finishing Sweet Dreams he collapsed on top of one of the monitors. Roadies could be seen on the side of the stage worriedly contemplating on whether or not to assist him.
The 49-year-old reportedly stumbled backwards and collapsed during Sweet Dreams.
He later tweeted, thanking fans for their understanding and explaining hed sought medical care.
Thanks Houston for being understanding, he wrote. I ended up in doctors care, but I gave it my best and you guys were amazing.
Thanks Houston for being understanding. I ended up in doctors care, but I gave it my best and you guys were amazing.
— Marilyn Manson (@marilynmanson) August 20, 2018
Temperatures in Houston on that day hit a high of 38 degrees Celsius.
Marilyn was previously forced to cancel a date on his tour after falling ill in Toronto on 27 July.
A statement tweeted from his account read: Marilyn Manson was unable to perform on his and Rob Zombies Twins Of Evil tour in Toronto last night due to the flu. Manson is recovering and is set to perform at all scheduled dates starting tomorrow at Heavy Montreal.
Marilyn Manson was unable to perform on his and Rob Zombies Twins Of Evil tour in Toronto last night due to the flu. Manson is recovering and is set to perform at all scheduled dates starting tomorrow at Heavy Montreal.
— Marilyn Manson (@marilynmanson) July 27, 2018
Reps have been contacted by Metro.co.uk.