Do not let them be
Your child will tell you what is bothering them. You should help and protect him. This is what your child expects of you. To reduce the psychological trauma caused by bullying or an attack on your child, you must never let him go.
Contact the appropriate authorities.
Once you have taken care of your child, you should go to the school’s teacher, guidance counselor, or father of the bully. Explain the situation to them calmly until you reach a solution. Then, protect your child without telling him.