Wrist, Hand & Finger Pain Causes. If you have pain the hand, understand potential causes of hand or wrist pain including arthritis, injury or other conditions. Read More >>. If you have wrist and hand pain, learn what steps your doctor may take to provide you with a diagnosis of arthritis or other condition.
Marijuana also affects brain development. When people begin using marijuana as teenagers, the drug may reduce thinking, memory, and learning functions and affect how the brain builds connections between the areas necessary for these functions.
It's the absolute worst time, she says, because the mind-altering drug can disrupt development. Lisdahl points to a growing number of studies that show regular marijuana use â once a week or more â actually changes the structure of the teenage brain, specifically in areas dealing with memory and problem solving. That can affect cognition and academic performance, she says.