The 72-year-old had appendicitis and had to undergo surgery.
On Thursday, he suffered severe stomach pain and went to the hospital.
At first I was thoughtful, worried and scared. So I just went to the emergency room, where they determined it was appendicitis, and then I had emergency surgery, he tells Aftonbladet.
His recovery means he is canceling scheduled trips and events.
Lerin is currently involved in the exhibition “The Dark Light” at Elverket in Stockholm.