Singapore Parents

My child is 3 years old. He has a sweet character but he gets to feel high all of a sudden such as throwing things around, running here n there till sweaty. It is like a totally different behaviour n I feel quite worried. Does he need some form of psychology therapy? Is this normal for a child his age?

Your child requires stimulus. Throwing is another way to gain stimulus.
I would redirect your child's actions into a structured play and involve learning new interactions.
e.g. When to throw, how to throw,
Have specific responses to specific actions.

Thats a good suggestion..