Hello Parent Sometimes children behave in this manner when they want to seek attention. Also we need to note down what all are the situations which cause him this anger, is it when he wants something we are always saying NO to it( is it our first reaction most of the times). Avoiding to eat could be sensory or behavioral( for better understanding consult a psychologist). So firstly you need to note down what all causes him this behavior, could be what he observes in his surroundings( violent environment around).

At this age kids start exerting their power by outward behaviour. Very common issue of temper tantrums. A detailed observation and record of some of these incidents will help professional to advice you on right way of handling the child

You need to have behvioural assessment including the Development Quotient of your child, consult psychologist for the help.