Neil, 61, shared an encouraging update on his condition Sunday via Instagram with a photo of himself and his longtime girlfriend Rain Hannah.
"Feeling better and ready to conquer the world thanks to @rainhannah for getting me through this dam Covid!!!" the singer wrote in the caption.
Neil had to cancel a solo performance at a festival in Key West, Florida, last week due to his illness. While he was confident he would make a full recovery, he added in a statement that the virus was "really kickin' my ass."
His recovery comes just in time for Mötley Crüe to begin rehearsals for its 'World Tour' with Def Leppard, starting next month.
Bassist Nikki Sixx admitted late-Monday that he couldn't wait to get started with another year of Crüe shows.
"42 years and I still get excited about the first day of band rehearsal," Sixx wrote. "Here we go..."
That prompted a reply from John 5 who asserted, "I'm more excited can't wait buddy."