Smoking marijuana can have lasting effects on the brain, especially if you start smoking as a child. 

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“When you’re young, your brain is forming. It’s changing every day. Your brain grows until you’re 25, at least,” Dr. Phil says. “And when you smoke marijuana, it’s like opening your computer up and pouring water inside. A lot of things short out, and it connects where it’s not supposed to, and really creates problems.”

WATCH: ‘I Do Want To Control My Anger But I Can’t,’ Says 11-Year-Old
In the video above, hear more about the effects of marijuana on the brain, including how it affects a person’s IQ.
On Tuesday’s episode of Dr. Phil, Dr. Phil speaks with a mom and her 11-year-old son who she says is out of control. She says he is violent, has destroyed their home, calls her names, and has smoked marijuana. Watch more here.