Now, however, the actor has shared a few more sobering updates about his health on Good Morning America. “My right side has completely stopped working,” he told the program. Dane said that he expects to lose control of the left side as well.

Eric Dane just revealed in April that he’d been diagnosed with amyotrophic lateral sclerosis (ALS), but he’s already lost function in his right arm and worries about weakness on his left side and in his legs.

Dane, who is known for his roles on “Grey’s Anatomy” and “Euphoria,” sat down with ABC News, saying, “I have one functioning arm ... my left side is functioning. My right side has completely stopped working.” He said that his left arm is “going.”