What Are the Signs That My Teenager Needs Drug Rehabilitation Treatment?

Realizing that your teenager might have a problem with drugs or alcohol is painful, and it’s often hard to know for sure. Many of the signs the National Institute on Drug Abuse (NIDA) describes, like hanging out with different friends, losing interest in favorite activities, changes in eating or sleeping habits, or more problems with family and friends, can also look like ordinary teenage ups and downs. If you’re noticing changes like these, it’s worth paying closer attention. The Centers for Disease Control and Prevention (CDC) encourages parents to seek treatment early if their teen is experiencing a substance use disorder, noting that “early treatment can make all the difference.” Knowing what to look for is the first step toward getting your teen the help they need.

Why Teen Substance Use Can Be Hard to Spot

A teenager’s brain is still a work in progress. NIDA explains that the brain keeps developing into adulthood, and one of the areas still maturing during the teen years is the prefrontal cortex, the part of the brain that helps people assess situations, make sound decisions, and keep emotions and desires under control. Because this part of a teen’s brain is still developing, teens are at increased risk for trying drugs or continuing to take them.

Substance use can also be hard to spot because its signs overlap with other struggles. Losing interest in favorite activities and changes in eating or sleeping habits are among the signs of a drug problem that NIDA lists, but similar changes can come with depression, and many teens struggle with both. In the 2024 National Survey on Drug Use and Health from the Substance Abuse and Mental Health Services Administration (SAMHSA), about two in five teens aged 12 to 17 who had a substance use disorder had also had a major depressive episode in the past year (two weeks or longer of feeling depressed or losing interest in daily activities, along with problems like trouble sleeping, eating, or concentrating).

That’s why one change on its own isn’t a diagnosis. A substance use disorder is identified by a pattern of problems, not a single sign. Under the criteria SAMHSA’s survey uses, a person is considered to have a substance use disorder if they have at least two problems from a set list within a 12-month period, such as falling behind on responsibilities at school or home, giving up activities they used to enjoy, strong cravings, or continuing to use despite problems with family or friends. The more of these problems a person has, the more severe the disorder is considered. You don’t have to sort this out on your own; a doctor or counselor can help figure out what’s behind the changes you’re seeing.

Signs Your Teen May Be Using Drugs or Alcohol

No single sign on this list proves your teen is using drugs or alcohol. Think of these as things to watch for, and if what you’re seeing worries you, it’s worth talking with your teen and reaching out to a doctor or counselor.

Behavioral Signs

Guidance from NIDA, SAMHSA, and the Drug Enforcement Administration (DEA) points to behavioral changes like these:

• Spending a lot more time alone, going to great lengths to keep family members out of their room, or having more problems with family.
• A new group of friends, drifting away from longtime friends, or being secretive about the new friends and reluctant to let you meet them.
• Lower grades, missing classes or skipping school, or getting in trouble at school or with the law.
• Losing interest in activities they used to enjoy, or a “nothing matters” attitude.
• Not letting you know where they’re going, or breaking curfew without a good reason.
• Sudden requests for money without a good reason, or money or other items going missing from your home.
• Changes in sleeping habits, like sleeping much more or much less than usual.
• Social media posts that show or mention drinking or drug use.

Physical Signs

Some physical signs can have everyday explanations, so look at them alongside the behavioral changes above. Watch for:

• Bloodshot eyes.
• Slurred speech, poor coordination, memory lapses, or trouble concentrating.
• Low energy.
• Losing interest in their clothing, grooming, or appearance, especially if they used to care about how they looked.
• Changes in eating habits.
• The smell of alcohol, marijuana, or cigarettes on their breath, or new use of cover-ups like perfume or cologne, mouthwash, or mints and gum.
• Frequent nosebleeds, which the DEA notes can be a sign of cocaine use.

Some signs call for help right away. The CDC lists these as signs of an opioid overdose: small, constricted “pinpoint” pupils; falling asleep or losing consciousness; slow, shallow breathing; choking or gurgling sounds; a limp body; and discolored skin, especially on the lips and nails. If you see these signs, call 911 immediately.

Emotional Signs

Moodiness can seem like part of being a teenager, which makes emotional changes especially hard to read. NIDA notes that when a teen starts behaving differently for no apparent reason, such as acting withdrawn, frequently tired or depressed, or hostile, it could be a sign of a developing drug problem. SAMHSA’s guide for parents also lists mood changes like flare-ups of temper, irritability, or defensiveness among its warning signs.

Emotional struggles and substance use can also go together. In its 2024 national survey, SAMHSA found that teens aged 12 to 17 with moderate or severe anxiety symptoms were more likely to have used illicit drugs (including marijuana and misused prescription drugs) in the past year than teens with few or no symptoms: 25.6% compared with 10.1%. That’s one more reason emotional changes are worth taking seriously on their own, whether or not substances turn out to be part of the picture.

When to Get Professional Help for Your Teen

Not every teen who shows these signs has a substance use disorder. But one sign deserves special attention: NIDA describes continuing to use drugs even though it’s harming their life as an important sign of addiction. If your teen keeps using despite problems at school, at home, or with their health, that’s a strong reason to bring in a professional.

You also don’t have to wait until you’re sure it’s addiction. NIDA‘s guide on treating teens notes that adolescents can benefit from help even if they are not addicted, and that substance use problems range from problematic use to addiction and can be treated successfully at any stage.

A good first step is your teen’s doctor. NIDA notes that the American Academy of Pediatrics recommends universal substance use screening in pediatric primary care, and that brief screening tools help providers sort teens aged 12 to 17 into three levels of risk: no reported use, lower risk, and higher risk. Asking for a screening, which is a short set of questions asked by the doctor, can give you a clearer picture of where things stand.

Getting help also doesn’t automatically mean residential rehab. NIDA’s guide says treatment should be tailored to each teen’s unique needs, and that the right setting depends on things like the risk of withdrawal, other medical or mental health conditions, how ready your teen is to change, the risk of continued use, and the environment they’d be recovering in.

Taking the Next Step

You don’t have to be certain your teen has a substance use problem before you reach out for help. If something feels off, talk with your teen, and share what you’ve noticed with their doctor, a counselor, or a treatment or community program. Asking questions early isn’t overreacting; it’s how you start getting answers.

Whatever you learn, this isn’t something you have to handle alone, and it isn’t the end of the story. Teens can and do get better with the right support, and a parent who stays involved and keeps the door open is part of that support.