Can You Develop ADHD as an Adult?

The Short Answer: ADHD Doesn't Start in Adulthood

A common question we hear is, "Can you develop ADHD as an adult?" No, ADHD doesn't start in adulthood. To be diagnosed with ADHD, you must have symptoms that are present before age 12. However, this does not mean that you can't discover that you have ADHD as an adult.

Many adults find out that they have had undiagnosed ADHD all along, and it isn't until certain life stressors hit that this becomes so obvious.  It’s frustrating to deal with these symptoms, regardless of when they started.

Let's take a look at why it can seem like your ADHD just appeared as an adult and why it might have been missed during childhood. Then we'll look at the importance of getting a proper diagnosis and receiving treatment so that you can live life with fewer disruptive ADHD symptoms.

Why It Feels Like Your ADHD Appeared Out of Nowhere

It may seem as if your ADHD is appearing in adulthood out of nowhere, but it can just become more pronounced when life demands increase. 

When you were a child, you had a structured environment thanks to your parents or teachers. As an adult, this structure is gone, and you are left to your own devices to create a routine. The structure from childhood could have helped to mask your symptoms, and it isn't until you are faced with real-world challenges on your own that you start to really see your ADHD symptoms.

When you were a child, your parents made you keep your room clean, they set an alarm for you to get up every morning, and teachers would let you turn in your homework late when you forgot it at school the night before. In your adult life, none of this support is there, and you may find you have trouble keeping your home neat and organized, getting up in the mornings, and managing important paperwork for work, utilities, or taxes.

You may have had previous coping mechanisms for your symptoms when you were younger, but major life transitions overwhelm you. For example, when you become a parent, you are responsible for taking children to their doctor's appointments, keeping their schoolwork in their backpacks, and managing all the laundry in the home. Yet all of these tasks overwhelm you and often pile up, and you can't figure out why they are so hard. When issues like that become impossible to ignore, you may realize that you have ADHD.

When Life Gets More Complicated, ADHD Gets Harder to Hide

Living on your own comes with increased responsibilities, and they tend to expose executive function challenges. For example, you start to notice how much you procrastinate over tasks that you don't enjoy doing. Because you have so many new responsibilities, you tend to start forgetting important dates, items, or even lose your train of thought mid-sentence.

Again, your childhood structure is no longer in place, so you have to self-direct your environment, which you're starting to realize is much harder than you assumed. You wonder why you can't seem to keep up with dishes in the sink, paying bills on time, and you can never find your keys or shoes before you leave the house because you don't know where you put them.

Multitasking demands a good bit of focus and attention, and it's when you are trying to keep up with work and home life that you notice how hard it is to do more than one thing at once. If there's a deadline for you to complete something at work, you wait until the last minute, leaving you overwhelmed. ADHD symptoms can become impossible to ignore when adult responsibilities and life changes increase.

You Might Have Been Masking ADHD Without Realizing It

Perhaps your adult ADHD was missed in childhood because you learned how to mask your symptoms effectively. Masking is often done unconsciously, but it is a way to hide your differences as a child so that you fit in or make your parents happy. Common childhood compensations include natural talents, high intelligence, and having supportive parents.

If you were really a smart kid, you might have gotten good grades even though you would forget your homework or fail to study. You could have used your natural talent of singing to compensate for your restlessness, as it would calm down your nervous system when you sang, and you'd be less fidgety. Perhaps your parents established a good routine at home and kept you involved in extracurricular activities. They would clean your room for you because you were at soccer practice all night, or you were too busy to notice your ADHD symptoms.

Masking can certainly continue well into adulthood, but at some point, you may face burnout or overexhaustion from having to work so hard to overcompensate for your symptoms.

Why So Many Adults Are Only Now Getting Diagnosed

Historically, ADHD was considered a childhood disorder. It wasn't until the late 90s that it became widely accepted that you didn't grow out of ADHD. ADHD persisted into adulthood. After that, ADHD awareness grew and diagnostic criteria evolved, which showed that adults had ADHD.

At first, it was actually thought to be a boy-only disorder, as females didn't show the same hyperactivity traits outwardly that boys did, so girls were often missed.

ADHD presents itself differently, too, as there are different types of ADHD. Not everyone with ADHD has hyperactivity. There is also inattentive ADHD, which was known as ADD. These children who don't present with the hyperactivity trait are often missed until adulthood.

There have also been socioeconomic and racial disparities in childhood ADHD diagnosis. For example, Asian children were more likely to receive a diagnosis of speech sound disorders or autism spectrum disorder before they received an ADHD diagnosis. Hispanic children were 35% less likely to be diagnosed with ADHD compared to white children.

Children from lower-income families were more than twice as likely to be diagnosed with ADHD as those from higher-income families.

Some of this may be due to an over-diagnosis of children who come from chaotic homes who act out and are then labeled with ADHD when it may just be that they are living in a stressful, chaotic environment that caused behavior disruptions.

ADHD in Women Often Goes Unnoticed Until Adulthood

Girls typically present with more internal ADHD symptoms than external symptoms, and this is a big reason they are often missed in school. Societal expectations lead girls to adjust and mask their behaviors in an effort to be a proper lady or a "good student." 

To avoid negative scrutiny, many females with ADHD adapt people-pleasing behaviors, and if they are also intelligent, make good grades, which causes them to fall through the cracks because they are not struggling academically or disrupting the class. 

Later in life, hormonal changes like pregnancy and menopause can expose ADHD in females, leading to a late diagnosis of ADHD. So it may not be until adult life hits, they begin a family of their own, or even go through menopause, that women decide to seek help for ADHD symptoms.

When Your Childhood ADHD Symptoms Were Missed or Dismissed

Certain childhood ADHD symptoms were dismissed as something else. Kids who were daydreaming or looking out the window weren't paying attention either because they didn't like school or because they were bored. Sometimes these kids were simply labeled as "not living up to their potential.”

Many, many children who were considered "smart but lazy" were missed, as this was just thought to be a personality issue and not symptoms of ADHD. Some behavioral issues were attributed to other causes. Some kids were misdiagnosed as having anxiety or depression, but it was really stemming from trying to manage their ADHD symptoms.

There was also a lack of access to mental health resources in some communities, so many children were missed because the parents didn't have anywhere to take them for mental health care. Often, pediatricians were the ones to test for ADHD, but if there were no psychological clinics nearby and the pediatrician didn't test, then the child was missed.

What Else Could Be Causing Your Symptoms?

Something else may be causing ADHD symptoms in adults. There are other conditions with overlapping symptoms, which is why it is so important to have a clinical evaluation to determine an ADHD diagnosis and rule out any other conditions before starting treatment. Conditions that can mimic ADHD include:

• Depression
• Anxiety
• Bipolar disorder or other personality disorders
• Sleep disorders
• Stress issues
• Thyroid problems

If your ADHD symptoms seem "new," then it could be another issue causing your symptoms, as ADHD is a lifelong issue and has to be present from childhood. 

What really complicates things is that ADHD is highly comorbid with other mental health disorders like anxiety and depression. So you could be dealing with more than one condition. Getting the proper diagnosis is the solution, even if you have ADHD and a co-occurring mental health disorder; both can be treated successfully.

When Stress, Anxiety, or Depression Look Like ADHD

Stress, anxiety, and depression can cause many symptoms that look a lot like ADHD. For example, chronic stress causes your body to go into fight-or-flight mode, which impacts executive function like ADHD. Restlessness, difficulty paying attention, trouble finishing tasks on time, and sleep issues can all overlap and present as ADHD, but may be something else.

Depression causes motivation and concentration issues, and makes it harder to keep the home tidy, which can all look like ADHD. Timing and symptom history are important for diagnosis, so when you work with a clinician, make sure to tell them which of these symptoms were present during childhood.

How Doctors Actually Diagnose ADHD in Adults

So, can ADHD start in adulthood? No, ADHD diagnostic criteria state that you must present with symptoms in childhood. But that doesn't mean it doesn't become more pronounced when you're an adult. 

When you get a clinical evaluation, a provider will review your childhood symptom history and assess whether you have disruptive symptoms that affect work, home life, or personal relationships, as they must cause problems for you in at least 2 areas of your life.

Clinicians will want to see any school records or report cards you may have and, if possible, ask your family members about some of your behaviors as a kid. They will also provide you with rating scales and symptom assessment tools to determine whether it's ADHD or something else. It's important to rule out other conditions before starting treatment. 

There is no single one-size-fits-all ADHD test, but providers use a combination of tools and questions to determine a diagnosis. It is so important that you see a clinician who specializes in adult-onset ADHD for an accurate diagnosis.

Why Your Childhood Matters for an Adult ADHD Diagnosis

The DSM-5 states that many ADHD symptoms must be present before age 12. This is the main way that they determine if it is ADHD or if you are experiencing something else altogether. Providers will look for patterns throughout your life, including your childhood. 

ADHD is not something that you can develop as an adult, but you are born with it. That doesn't mean that you didn't slip through the cracks as a kid. In fact, there are many adults with late-diagnosis ADHD.

If you don't have access to your report cards or school records, you could ask family members or childhood friends to share their personal accounts and describe your traits as a child. Family members and old records can provide evidence. Still, clinicians can also help you think back by asking questions about your childhood related to your symptoms now and ask you to describe your experiences to the best of your memory.

What to Do If You Think You Have ADHD 

Now that we’ve looked at the question “ Can you develop ADHD as an adult?” You can see why it may appear that way, but in reality, you have had ADHD your whole life. If you suspect that you might have ADHD, you can get started with an easy screening tool to help you determine if your symptoms might be from ADHD. 

Then it is important to find a clinician who specializes in adult ADHD diagnosis. They can provide a comprehensive evaluation, which is so important, to rule out other medical conditions first.

If you do have ADHD, there is treatment available to help. You can get started with therapy, medication, or coaching, or a combination of all three. Effective treatment can significantly improve your quality of life and help you manage your symptoms. 

At ADHD Advisor, we provide same-day online evaluations and, if diagnosed, therapy and medication management all via telehealth. Hence, you never have to leave the house or get on a waiting list. We then provide monthly follow-up appointments to ensure your treatment is working as it should. Seeking help for ADHD symptoms may be scary, but it can change your life.

Frequently Asked Questions

Can you develop ADHD as an adult?

No, developing ADHD later in life is a false notion. You are born with ADHD, but symptoms may not have become apparent until you became an adult.

Is adult-onset ADHD real, or is it always undiagnosed childhood ADHD?

Adult-onset ADHD is really undiagnosed ADHD that happens to become more obvious in adulthood.

Why am I showing ADHD symptoms for the first time as an adult?

As a child, you may have had a strong parental support system or teachers at school who helped keep your symptoms at bay, or you may have masked symptoms by overcompensating with good behavior or good grades.

What causes ADHD symptoms to appear or become noticeable in adulthood?

ADHD appearing in adulthood is due to the life stressors that you didn't have when you were a child.

Can ADHD be masked in childhood and only appear in adulthood?

Yes, many ADHD symptoms can be masked in childhood, only to be discovered when adults' responsibilities cause them to show.

How do I know if I developed ADHD as an adult or just never noticed it before?

ADHD is present in childhood, so you didn't develop it as an adult. Symptoms may have been milder as a child because you had less stress then.

What's the difference between late-diagnosed ADHD and true adult-onset ADHD?

True adult-onset ADHD does not exist because you must have symptoms present before age 12 to have ADHD, according to the DSM-5. It is late-diagnosed ADHD, and the symptoms were simply not noticed or as pronounced when you were a child.

Can life changes or increased stress trigger ADHD symptoms in adults?

Yes, life changes and stressors can definitely trigger ADHD symptoms in adults because your symptoms can become impossible to ignore or overlook as high stress overloads your executive functioning.

Why do some people get diagnosed with ADHD later in life?

Many adults get diagnosed with ADHD later in life because adult life has made it impossible to mask or cope with symptoms that were managed as a child.

Can anxiety or other conditions mimic ADHD symptoms in adults?

Yes, anxiety and other conditions like bipolar disorder and depression can mimic ADHD symptoms in adults, which is why a clinician will determine if your symptoms have been present since childhood or are more recent.