Between school and extracurricular activities, a teenager’s life can be very busy. Many teens place high expectations on themselves because they feel pressured to achieve, compete with peers, and transition into adulthood. Parents may hear “Sorry, I forgot” a lot, especially during periods of stress. Teens, if you notice you’re forgetting things, that doesn’t necessarily mean there’s something wrong with you. There’s a good chance your brain is a bit overwhelmed.
“Many adolescents who believe they have a memory problem are actually struggling with attention,” said Summer Appleby, program administrator at Embrace U’s Smyrna location. “A useful question is: Did you forget it, or did you never really get a chance to focus on it?”
This is especially relevant for teens in Tennessee, where stress, sleep loss and mental health concerns are common. According to the 2023 Tennessee Youth Risk Behavior Survey (YRBS), only 18.3% of Tennessee high school students got eight or more hours of sleep on an average school night, while 42.7% reported feeling sad or hopeless for two weeks or more during the past year.
Forgetting things is a fairly common issue among young adolescents, according to the University of Wisconsin-Madison. This is because the adolescent brain is rapidly expanding and teenage thought patterns often take a disorganized route. Taking time to relax and take care of yourself may help you focus on the important things. If your health or your mental health is suffering, certain conditions can play a role in poor memory for teenagers.
This article discusses some potential reasons why you may have trouble with short-term memory as a teenager.
Why is my memory so bad as a teenager?
While frustrating, some forgetfulness as a teenager is normal. Several different behaviors and health conditions can affect your memory. Not getting enough sleep, stressing over too many activities or vitamin deficiencies are all common reasons why teens struggle with short-term memory. Eating too much junk food early in life was linked to poor memory in one study. Use of substances like alcohol and marijuana also impacts memory. Areas of your brain that manage memory and planning may be undergoing big developmental changes, and hormones can have overstimulating and distracting effects. Health issues that can impact your memory include neurodevelopmental disorders like ADHD, thyroid conditions, congenital heart disease, head injuries and medication side effects.
9 potential causes of poor memory in teenagers
The first thing to do if you’re forgetting things frequently is to slow down, take a break and take care of your health. Try to lower your stress level, make time for important things like homework and some relaxation, and be sure to get enough sleep. If you’re still having memory issues, talk with your parents or your doctor and let them know about any other symptoms you’re noticing, such as feelings of sadness, dizziness, exhaustion or confusion.
The following conditions and behaviors can all negatively affect a teenager’s memory:
- Stress: Your brain can only handle so much in a given day. Having too much to do can cause some details to slip through the cracks. If you’re feeling overwhelmed or multitasking a lot, try to put some activities on hold and simplify your life for a few weeks. Get some relaxation by taking a bath, practicing mindfulness or spending time with a pet.
“A stressed brain is focused on survival, not storage,” said Appleby. “As stress increases, concentration decreases, making it harder to absorb and retrieve information.”
- Unhealthy habits: To function at its best, your brain needs the right nutrients and a minimum of eight hours of sleep per night. Too much junk food or too little sleep can negatively impact your memory.
According to the CDC, adolescents require 8-10 hours of sleep per 24 hours, and insufficient sleep is linked with attention, behavior, and mental health problems.
It helps if you go to bed and wake up at the same time, even on weekends. Try restricting your phone use for an hour before bed, and stick to a nightly routine that helps you calm down.
- Developmental changes: The prefrontal cortex develops pretty rapidly at certain points in your teenage years. This is the area that manages planning and memory. Surges in hormones can also take up some of your focus, contributing to memory issues.
- Neurodivergence: Neurodevelopmental conditions like ADHD and dyslexia can make it harder to remember things. You’d also notice other symptoms like inattentiveness, boredom, sensory overwhelm, or difficulties in math or reading.
- Health problems: Certain health conditions are known to cause memory problems, such as thyroid disorders, congenital heart disease and head injuries. If you’re noticing other symptoms like restlessness, fatigue, a rash, trouble sleeping, or a fast heart rate or pounding heart, you should keep track of your symptoms and tell your doctor.
- Mental health conditions: Conditions like depression, anxiety and trauma can cause memory issues in teenagers. Anxiety can make forgetfulness look like missed assignments, lost items, forgotten instructions or reading the same page without retaining it.
“Anxiety often fills a teen’s mental space with ‘what if’ thoughts and constant scanning for potential problems,” said Appleby. “Their cognitive energy is being directed toward managing perceived threats rather than processing new information.
Depression can also affect concentration, motivation, processing speed, organization, and memory. A teen may appear lazy or disengaged when they’re struggling with reduced mental energy. According to KFF, nearly 18% of Tennessee adolescents, about 98,000 teens and preteens, had a major depressive episode between 2023-2024.
Trauma can have a similar effect. “A teen may seem distracted or disorganized, but their nervous system may be working hard to manage stress or stay alert to possible danger,” Appleby said.
- Vitamin deficiencies: B1 and B12 are both vitamins that support memory function. If you’re low on one of them, you may notice some forgetfulness. You’d need to see your doctor for a blood test to check your vitamin levels.
- Medication side effects: If you’ve just started a medication like a tranquilizer, antidepressant, or blood pressure medication, it could be contributing to your memory issues. Talk with your prescribing physician about your symptoms.
- Substance use: Alcohol, marijuana and other controlled substances can cause forgetfulness, especially for young people. According to the 2023 YRBS, 16.9% of Tennessee high school students currently used marijuana. Stop substance use as soon as possible, and if you need help quitting, talk to your doctor.
Don’t wait to get help with poor memory and related symptoms
Being a teen is stressful enough without memory issues, and occasional forgetfulness is usually not a crisis. But if memory problems are getting worse, come with other symptoms, or are interfering with school, family life, friendships, or everyday responsibilities, it may be time to talk with a caregiver, doctor, or mental health professional. You should pay attention to sudden changes, academic decline, trouble completing daily tasks, major mood or behavioral changes, or significant attention problems.
“The key question is whether forgetfulness is occasionally inconvenient or consistently impairing,” said Appleby.
Some lifestyle changes, medical care, or therapy may help, and building healthy habits like getting enough sleep and eating well is a good place to start.
How Parents Can Support a Forgetful or Overwhelmed Adolescent
Try responding with curiosity before criticism. Instead of saying, “You never remember anything,” ask what was happening when the assignment, chore, or conversation slipped their mind. Were they tired, anxious, distracted, overloaded, or unclear on the next step?
Parents can also help teens build systems instead of relying on repeated reminders. This might include a shared calendar, a written homework checklist, a phone reminder, a designated spot for school items, or a short weekly reset conversation.
“When teens participate in creating solutions, they develop confidence and independence rather than shame,” said Appleby.
How Embrace U Helps
At Embrace U, we offer outpatient programs designed to help teens who are experiencing mental health conditions that get in the way of everyday functioning and schoolwork. When you’re experiencing a condition like depression, anxiety or trauma, your brain chemistry changes. These challenges can impact every part of a young person’s life. However, with effective treatment, you can develop the resilience and the skills to maintain mental wellness throughout your teen years and adult life.
Have questions? Contact our team today. If you’re ever looking for more comprehensive mental health treatment, we’ll be here for you.
