What are the warning signs that someone is on steroids?

What are the warning signs that someone is on steroids?

Michael O'Hearn (American Gladiator) gives expert video advice on: What are 'anabolic steroids'?; What effect do anabolic steroids have on the body?; Are steroids illegal in the US? and more...

Mid age acne, they look purple, some guys in the gym walking around, they actually look purple. It's high blood pressure, not good looking.