I've noticed sense my son got his vaccines at his one year check up and had a fever he has been extremely aggressive he's constantly hitting tries to bite throwing tantrums all the time. He did it before but it was rare and not so extreme. I don't know if he's having maybe a bad reaction to the fever and vaccines. Idk how to handle it I try to stay calm and just talk to him tell him not to hit and etc but it just seems to be getting worse. Anybody else experience this? How did or do you handle it?