I am 30 years old. My son is 8 years old. He behaves very aggressively even with the elders of house. I am worried because of his disrespectful nature, disobedience and foul language. Even when he is happy he finds a reason to be sad. Also does not want to study, always starts crying. His father completes his all demands but he has no value of it. I am afraid to take him along to somebody's place because he might behave rudely. please help me understand the cause for his behaviour. His grandparents also live with us. When he is in aggression he is not aware of what he is speaking.