How does being bullied affect people?

well, bullying is a horrible thing, people get mentally bullied, physically bullied and even sometimes so bullied that they suicide, about 23% of people die because of suicide and bullies, so if your getting bullied, take my advice, you know how teachers tell you to tell them? FIGHT BACK, how can you tell a teacher if your being punched in the face, so fight back, then tell them, if you get in trouble, say "i was only protecting myself." because its true.