Bossy 5 Year Old Hitting His Mother and Sister

I have a 5 year old son who is a wonderful, respectful and caring boy, 80% of the time. During the remaining 20% of the time, he is disrespectful, angry, moody, and yelling at my 13 year daughter and myself as much as possible. He turns red in the face. He punches. He puts his face right in mine and tries to bully me around. I remain as calm as possible. His behaviour starts whenever he doesn't get his way. My daughter never behaved this way, so it's very difficult for me to understand how to handle him, or how to react to his behaviour. I have no experience. Every day we run into problems. I would appreciate help and advice because this situation has drained me emotionally and made me quite sad.

[cheshchesh819]

When he screams in your face give him eye contact and with a firm voice tell him it is wrong to hit and scream at mummy then place him in a quite spot in the house and tell him he is to remain there for 5 mins,if he moves keep putting him back it might take time but should work,after the 5 mins tell him to say sorry and then hug him,never let him get away with this behaviour,but dont give him to much attention or give into him.

[margypops]

How does his sister behave towards him is she kind or does she instigate any of his behavior at all, he sounds upset by something, can you give us an instance of what happened just prior to an episode .?

[Mommy1997]

His sister is kind, and she tries to help as much as possible. Nothing in particular happened prior to this or any other episode.