Tell teh teacher to really watch his interactions with the other kids and see if she can spot anything going on. For him to suddenly start this, I think something at school is really bugging him.
Definitely agree with specialmom - classic case of bullying.
My daughter was going to camp past summer, and was doing fine until one day an older boy submerged her into water during pool swimming lesson. She did tell the teacher and the boy was suspended from pool for 2 lessons, but after that he and his friend started bullying my daughter. She was only 5 at that time and both boys were 10. They would chase her from toys when she wanted to play and call her "worthless".
All that I found out after talking to my daughter when she started refusing going to camp and crying. None of the teachers (3 of them!) noticed bullying. After bringing this up to the teacher, everything was settled and she was her happy self again.
Talk to your boy, he should be able to tell what is happening, and then talk to the teacher.
Good luck!
That is a classic sign of someone bullying him in some way.
Has anything happened? My 5 year old also in kindergarten was displaying signs of anxiety recently as well and I did not know why. Come to find out, the person he sat on the bus with was punching him. He had been friendly with the boy who is a year older but he had taken to punching my son every day on the ride home. We've taken care of it and the anxiety symptoms are lessoning.
He didn't tell me by the way. A neighbor called me as her daughter told her about it. When I asked my son about it he burst out crying because he didn't understand why this boy was now being mean to him.
So, gently talk to your son. good luck
No you dont need to be strict children thrive on kindness and attention,he not being bad, he is upset, find out how he is getting along with other children at school , does he mix with any older ones .Something must trigger the crying, did the teacher enlarge on 'when' it was happening ,ask her what triggers it . Have there been any changes at home to make him more clingy, new sibling house move, is Dad around.,and plays with him ...