Raiola was filmed responding to a fan in Miami with obscene words and a hand gesture as he walked off the field following the Lions' 34-27 win Sunday.
Raiola, a team captain, said Wednesday it wasn't a good way to conduct himself.
"It's like when you're a kid, and you do something wrong, and you get beat up for it, your dad beats you up,â Raiola told the Detroit Free Press. "I got beat up. I got fined. Usually, you move on to the next day."
"I'm just emotional," Raiola said. "Interaction with the crowd, it's a part of every Sunday."
The Associated Press contributed to this report.