Eddie Van Halen is back home, hanging out with his son after suffering through a few rough days in a hospital with what we're told were complications from his cancer treatment.
Sources close to the legendary guitarist tell TMZ ... he was admitted to the hospital last week with intestinal issues and abdominal pain. We're told both were the result of a bad reaction to the drugs Eddie is taking to battle throat cancer.
He was released Sunday and we're told he's doing fine now.
We broke the story ... the rocker has been flying between the U.S. and Germany for 5 years to get radiation treatment. Eddie believes he developed the cancer from a metal guitar pick he used more than 20 years ago -- he would hold the pick in his mouth and has been told it could be the source of the cancer.
When he got home from the hospital ... we're told Eddie and his son, Wolfgang, hung out and rehearsed music. If ya don't know, Wolfgang became Van Halen's bassist in 2006.
Rock on, guys!