Teen Vaping and Substance Use: Warning Signs and How to Talk About It

What teens are most likely encountering

Among U.S. teenagers, the substances most commonly tried include nicotine vaping (e-cigarettes), alcohol, and cannabis. According to the 2023 National Survey on Drug Use and Health (NSDUH), approximately 11.2% of adolescents aged 12 to 17 used marijuana in the past year, making it the most commonly used illicit substance in this age group 1Ref 1Substance Abuse and Mental Health Services Administration (2023).Key Substance Use and Mental Health Indicators in the United States: Results from the 2023 National Survey on Drug Use and Health.11.2% of adolescents aged 12–17 used marijuana in the past year in 2023; most common illicit drug in this age group. The 2024 National Youth Tobacco Survey found that 1.63 million middle and high school students currently use e-cigarettes — 7.8% of high schoolers and 3.5% of middle schoolers 2Ref 2Centers for Disease Control and Prevention (2024).E-Cigarette Use Among Youth.1.63 million youth (5.9%) used e-cigarettes in 2024; nicotine harms adolescent brain development; 42.1% of current youth vapers reported moderate-to-severe depression or anxiety symptoms.

Vaping is particularly worth parents' attention because devices are small and discreet, the vapor dissipates quickly, and many teens do not think of it as seriously as cigarette smoking. The CDC notes, however, that nicotine in e-cigarettes can harm the developing adolescent brain, affecting attention, learning, mood, and impulse control 2Ref 2Centers for Disease Control and Prevention (2024).E-Cigarette Use Among Youth.1.63 million youth (5.9%) used e-cigarettes in 2024; nicotine harms adolescent brain development; 42.1% of current youth vapers reported moderate-to-severe depression or anxiety symptoms.

Behavioral and social warning signs

Substance use often shows up first in social patterns. A teen who abruptly drops long-time friends for a new group, becomes secretive about their whereabouts, or starts needing more money without explanation is worth paying attention to. Other signs include:

• Changes in motivation or interest in activities they previously cared about
• Staying out late or sneaking out
• Red or bloodshot eyes
• Smell of smoke or a sweet, chemical, or fruity smell on clothing or in their room
• Unusual tiredness at unusual times
• Finding small devices, cartridges, USB-shaped pods, or paraphernalia

None of these signs is conclusive on its own, but patterns over time are meaningful.

Physical signs specific to vaping

Vaping devices range from cigarette-like sticks to USB-drive-shaped devices to small pods that can be hidden easily in a palm or pocket. Physical signs that may suggest vaping include: persistent dry cough or throat irritation, increased thirst, nosebleeds, headaches, or finding small devices with chargers or flavored cartridges. A sweet or fruity smell on a teen, in their room, or in a car may be vaping-related. Mouth sores have also been noted in some regular vapers. In 2024, 42.1% of youth who currently used e-cigarettes reported moderate-to-severe symptoms of depression or anxiety — a finding that may reflect both the population drawn to vaping and nicotine's direct effects on mood 2Ref 2Centers for Disease Control and Prevention (2024).E-Cigarette Use Among Youth.1.63 million youth (5.9%) used e-cigarettes in 2024; nicotine harms adolescent brain development; 42.1% of current youth vapers reported moderate-to-severe depression or anxiety symptoms.

Cannabis and the developing brain

Cannabis is now available in highly concentrated forms in many areas. Research published in JAMA Psychiatry found that cannabis use during adolescence was associated with accelerated cortical thinning in predominantly prefrontal brain regions between ages 14 and 19 — areas critical for judgment, impulse control, and planning 3Ref 3Albaugh MD, Ottino-Gonzalez J, Sidwell A, et al. (2021).Association of Cannabis Use During Adolescence With Neurodevelopment.Cannabis use during adolescence associated with accelerated cortical thinning in prefrontal regions between ages 14–19. Pediatric and adolescent health organizations advise against teen cannabis use on this basis. Parents whose teens say "cannabis is natural and safe" can point to this evidence that the adolescent brain, still developing well into the mid-20s, is particularly affected by regular or high-potency cannabis exposure.

How to have the conversation

Research on adolescent substance use consistently finds that parent-teen communication is a protective factor — teens who can talk openly with parents are less likely to escalate use. The tone matters considerably. Starting with curiosity ("I've been reading about how common vaping is now — what do you see among your friends?") is often more effective than confrontation. If a direct conversation is needed, naming the specific observation without catastrophizing — and asking questions before making statements — tends to go better. Teens who feel heard are more likely to be honest.

When to involve a professional

Experimentation is common in adolescence and does not automatically indicate a substance use disorder. However, signs that warrant professional attention include: daily or near-daily use, using substances to cope with emotional distress, significant academic or social decline, withdrawal symptoms when not using, or a teen who cannot stop despite wanting to. A pediatrician is a good first call; they can have a confidential conversation with the teen and refer to a substance use counselor if appropriate. Motivational interviewing, a specific counseling approach, has evidence for adolescent substance use and is widely used in pediatric primary care.