how long does it take to see a result when disciplining children ?

at the moment, when my son misbehave, i take his favorite toy away and instead of making him understand and do what i want him to do, he goes into a excruciating rage, screams his lungs off and get very violent. Is it a natural reaction ?

It takes about one hours before he can have a semblance of calmness.

It is a nightmare to get him brush his teeth, even though he just returned from the hospital to have six teeth taken out. Even the day freshly out of the hospital, he was asking for sweeties. i did not get him any,but i am really at a loss at what comes into his mind.