Reading time: 5 min
Uploaded on: February 9, 2026
Inattentive ADHD is a common, misunderstood subtype of ADHD. Unlike the stereotypical symptoms ADHD is associated with, such as being hyperactive and disruptive, inattentive symptoms are often less obvious. This often leads to it being overlooked and underdiagnosed in both children and adults.
- Inattentive ADHD is a ‘quieter’ type of ADHD that’s associated with low attention span and daydreaming rather than hyperactivity.
- Inattentive ADHD has no single cause; genes and environment both play a role.
- Common symptoms include trouble paying attention, difficulty finishing tasks, mental fatigue, disorganisation, and emotional sensitivity.
- Treatment usually combines medication, CBT, and lifestyle improvements to help manage focus, mood, and daily routines.
What is inattentive ADHD?
Inattentive ADHD is one of the three main subtypes of ADHD.
People with this subtype tend to get easily distracted and struggle to maintain focus. While they don’t exhibit hyperactivity or impulsiveness, they may experience symptoms such as restlessness, emotional sensitivity, and difficulty concentrating.
For example, someone with inattentive ADHD might be described as "spacey" or a "daydreamer." They may also be labelled as lazy for losing focus easily or for not completing tasks on time.
If you notice that you lose focus easily, but don’t experience hyperactivity, it's important not to dismiss the possibility of having inattentive ADHD.
Is inattentive ADHD the same as ADD?
Yes, inattentive ADHD is the same as ADD (Attention Deficit Disorder).
ADD became ADHD in 1987 – before this, ADD and ADHD were considered two separate conditions. But new research found that hyperactivity and inattention were part of the same mental disorder, and ADD (now known as primarily inattentive ADHD) is actually a subtype of ADHD.
Nowadays, doctors won't refer to inattentive ADHD as ADD, since it’s an outdated term. You'll be medically diagnosed as ADHD, but with an inattentive subtype. However, some people may still use ‘ADD’ in everyday conversation.
How common is inattentive ADHD?
Perhaps surprisingly, inattentive ADHD is actually more common than the hyperactive subtype, especially in adults.
It accounts for 20%-30% of all ADHD cases,[2] and in adults, around 31% have the inattentive subtype, while only 7% have the hyperactive subtype.[1] The most common subtype overall is combined ADHD.[1][2]
Many people with inattentive ADHD are diagnosed in adulthood. This often happens because children with inattentive ADHD aren’t typically disruptive, so parents and teachers often overlook their symptoms.
Hyperactive ADHD can also transition into inattentive or combined ADHD in adulthood. A child who initially presents hyperactive symptoms might develop more inattentive symptoms as they grow older, possibly because they need to concentrate more during college or work.
Additionally, people with the inattentive subtype might mask and internalise their symptoms, resulting in underdiagnosis. So it’s likely that the actual number of people with inattentive ADHD is higher than we think.
In men
Overall, men are more likely to have ADHD, but are less likely to be diagnosed with the inattentive subtype, especially as children.[3] As the inattentive subtype is quieter in presentation and runs against the stereotypical image of ADHD in boys, it’s usually overlooked by parents and teachers.
Recognising ADHD in boys who are disruptive, loud, or seen as ‘naughty’, is usually easier than identifying it in boys who are labelled as ‘lazy’, or ‘bored’, and struggle with tasks because they appear unbothered and inattentive.
Common inattentive ADHD symptoms in men and boys include:
- Work or academic struggles
- Forgetfulness
- Disorganisation
- Procrastination
- Becoming easily frustrated when overwhelmed
- Perceptions of laziness or lack of ambition
In women
Women are more likely to have inattentive ADHD, but it’s usually overlooked, which leads to getting diagnosed late or never at all.
From a young age, girls may ‘put on a mask’ and hide their symptoms. Or parents and teachers might describe them as ‘daydreamers’ or ‘spacey’, without realising these are symptoms of inattentive ADHD. Even though they don't present externally obvious or disruptive symptoms, internally, they may feel restless, panicked, or have racing thoughts.
Girls are also more likely to appear perfect in an attempt to fit in.[4] They'll try to stay organised and act similarly to other girls. While on the surface they might seem fine, this can feel overwhelming and lead to chronic burnout.
Hormonal changes can also worsen symptoms. After ovulation and during menstruation, reduced oestrogen levels can increase the severity of ADHD symptoms.[5]
Common inattentive ADHD symptoms in girls include:
- Being quiet
- Daydreaming
- Zoning out
- Shyness
- Chronic burnout
- Anxiety or depression
- Guilt, such as when forgetting to do a task
- Emotional sensitivity
Jump to:
Inattentive ADHD: Causes and symptoms
Inattentive ADHD: Diagnosis and treatment
References:
- Wilens, T. E., et al. (2009). Presenting ADHD Symptoms, Subtypes, and Comorbid Disorders in Clinically Referred Adults with ADHD. The Journal of Clinical Psychiatry, 70(11), 1557.
- National Institute for Health and Care Excellence (NICE) (2025). Attention deficit hyperactivity disorder: How common is it? NICE.
- NASET - National Association of Special Education Teachers. (2023). Recognizing the Inattentive Subtype of ADHD in Boys - NASET.
- Quinn, P. O., & Madhoo, M. (2014). A Review of Attention-Deficit/Hyperactivity Disorder in Women and Girls: Uncovering This Hidden Diagnosis. The Primary Care Companion for CNS Disorders, 16(3), PCC.13r01596.
- Sandra Kooij, J. J., et al. (2025). Research advances and future directions in female ADHD: The lifelong interplay of hormonal fluctuations with mood, cognition, and disease. Frontiers in Global Women's Health, 6, 1613628.
Reading time: 5 min
Uploaded on: February 9, 2026
