It is hard to know for sure but more than likely he became self conscious in the school setting and this was the way it came out. Boys are more likely to develop stuttering issues then girls but girls also can develop a stuttering problem. In most cases this issue will resolve itself but it is very important to take your son for a speech/language evaluation. This is because he might develop some self doubt that can effect his self esteem. Children can be cruel and make fun of your child which can be harmful. The sooner he can learn strategies to reduce his anxiety the better it will be. Good luck, Darrell Lauer

That’s difficult to answer. I would advise you to go to a speech therapist.

There are a few different known causes of stuttering. It can be genetic, acquired by neurological damage, psychological or the cause can be unknown. The important thing is getting him evaluated by a speech-language pathologist if his stutter is negatively impacting his ability to communicate.

Children can develop stutters at different times, for different reasons. I would seek out a speech language pathology evaluation for assessment and treatment.