The 'Righteous Gemstones' actor said he was previously diagnosed with stiff-person syndrome before an expert clarified that was not the case

Devine has been dealing with chronic pain from an accident he had as a child when he was hit by a cement truck.

Comedian Adam Devine, who has starred in hit TV shows such as HBO’s "Righteous Gemstones" and ABC’s “Modern Family,” says he recently was told by doctors that he is dying after they thought he might have a rare disease.