Mar 25, 2026

What Happens When Your Drink Alcohol as a Teen?

Adolescents

Summary: This article explains what happens when you drink as a teen, particularly in the brain and how to get help for teens who are struggling with alcohol abuse.

Alcohol is the most common drug used by people under the age of 21. Unfortunately, when teens start drinking early, they are more likely to develop physical or mental health issues. Young people who start drinking as teens are more likely to:

Engage in risky behaviors
Have school absences
Experience lower grades
Misuse other drugs

Teens who start drinking are more likely to binge drink as well, whether that’s through social settings and peer pressure, boredom, or experimentation. No matter the cause, drinking at a young age can be detrimental to physical and mental well-being. A big part of this is due to how the teen brain works.

What’s important for families to remember is that when they have teenagers who have started drinking, there is treatment available. With proper rehab and outpatient support, teenagers can learn better communication and coping skills, and help prevent serious consequences.

What Happens When You Drink Alcohol As a Teen?

The effects of alcohol are different on a teen’s brain as compared to an adult’s brain simply because teenage brains haven’t reached their full density in the prefrontal cortex or the hippocampus.

Prefrontal Cortex

The prefrontal cortex is the area responsible for impulse control, decision-making, and judgment, and it doesn’t reach its full size until ages 25 to 30.

It is the prefrontal cortex that helps a teen weigh risks versus rewards, like the immediate gratification of drinking, in favor of staying sober and studying for a history test next week. With underdeveloped prefrontal cortices, young teens are less able to control their impulsivity and really understand those negative consequences. The more they drink, the worse the cycle becomes.

Hippocampus

The hippocampus is the part of the brain critical for memory and learning, but early drinking can lead to poor performance on things like:

Spatial skills
Memory
Attention

Many scientists believe that when teens start drinking excessively, they end up with less gray matter in the hippocampus and a smaller amygdala. This means problems long into adulthood with things like memory and attention. Functional MRI scans during working memory tests show that teenagers who are heavy drinkers don’t use the areas of the brain normally associated with memory, whereas a teenager of the same age who doesn’t drink uses several areas of the brain.

Find the Help You Need

At NY Center for Living, we provide teen and young adult programs on an outpatient basis. For teens who might be struggling with drinking, we provide programs with a focus on family support and wellness activities. Our weekly group therapy schedules give teens a chance to find aftercare after rehab and build communication skills. With individualized care, teens can work to build a recovery community. Families, too, get help to better understand the recovery process and what they can do at home.

Don’t wait to get help.

What happens when you drink alcohol as a teen? Contact NY Center for Living to find treatment and answers at 646-692-0034.

FAQ

How Does Alcohol Affect a Teen Brain?

Alcohol negatively impacts decision-making and impulse control, making it harder to make good decisions or concentrate. Teens are also more likely to binge drink, which can lead to memory blackouts and injuries while intoxicated.
When adults drink, they might lose their balance, start slurring their words, and feel a bit woozy but the teenage brain doesn’t react as strongly to the short-term effects of alcohol which means teens can drink much more before they start to feel woozy or sleepy enough to stop drinking and they are less sensitive to the after effects of a hangover meaning they are less likely to stop drinking due to post intoxication.

Does Drinking as a Teen Lead to Injuries?

Teens are at a higher risk of harmful behaviors or accidents in large part because young brains are still developing and don’t assess risk in the same manner as developed adult brains. Drinking as a teen leads to an increased risk of things like:
– Vomiting and blackouts
– Injury and assault
– Car accidents
– Acute alcohol poisoning
– Arguments, fights, and treating other people the way they wouldn’t normally be treated
– Behaving in a way that is abnormal, potentially damaging reputation and friendships
Many of these injuries, accidents, and risks are similar to risks that adults face, but are often more pronounced in teenagers.

Why Do Teens Drink?

There are several reasons why teens might start drinking, from social pressure to boredom, to experimentation or self-medication. However, studies indicate that the most influential role models for young people tend to be their parents or primary caregivers, so if drinking is a regular occurrence in the house, this can have an influence on the decisions that teenagers make.
While parents might drink responsibly in the home, this can still have an impact. Adults can’t prevent teens from experimenting, but can encourage healthy habits.

What Happens to Mental Health When You Drink as a Teen?

Teens who drink are at an increased risk of mental health issues, especially anxiety or depression. Teenagers who already have these types of mental health issues might see an increase in symptoms because of alcohol consumption. Many teens who are currently on prescription or over-the-counter medications, especially antidepressants, might have negative interactions when they drink.

Can Drinking as a Teen Harm You in Adulthood?

Teenagers who start drinking early in life are more likely to struggle with alcohol dependence and binge drinking in adulthood. There is an inverse correlation between when teenagers first drink alcohol and their likelihood to drink alcohol regularly, meaning teens who wait until they are much older to start drinking are less likely, and vice versa. Teenagers who do end up drinking in adulthood, even at low levels, are at risk for damage to the body, including liver damage, heart disease, cancer, or stroke.