Adam Devine had a devastating accident when he was a kid and is still dealing with the fallout. But a recent diagnosis of stiff person syndrome was off the mark.

Celine Dion is the best-known sufferer of this disorder, one of many autoimmune illnesses that disproportionately impact women.

Adam Devine got candid about his ongoing health battle, which he said has been “a nightmare.” “They don’t really know [what’s going on]. I was having spasms all over and I still kind of do,” Devine, 41,