Toddlers usually act out their inner distress. They do not have adequate vocabulary to express their feelings.
What is needed is to identify the root cause of this behaviour? It usually is multi-factorial. Once adequately assessed, a management plan be chalked out.
Next Steps
Consult a psychiatrist having special interest in child psychiatry
Health Tips
Be consistent, firm, set up a routine. Never shout or hit the child. Doing this will most likely worsen his problems