Okay kiddo, so you know what marijuana is right? It's a plant that people use to feel better or for fun. They can smoke it, eat it, or even put it in their veins - which is called intravenous use.
Now, when people use marijuana this way, it can actually make them very sick. Their blood pressure can go really low, and they might feel dizzy, throw up, or even have a heart attack. This is called intravenous marijuana syndrome.
It's kinda like if you ate too much candy and felt really sick, but worse. Sometimes people even have to go to the hospital because they feel so bad.
So, it's important to remember that marijuana shouldn't be used in this way because it can be dangerous. Always make sure to talk to a doctor if you have any questions about using it.