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What Is ADHD and Its Symptoms? Types, Signs in Children and Adults, and Treatment

A child who can’t sit still, a teenager who loses everything, an adult who is always late and can never finish tasks. Too often these people are called lazy, careless or naughty. For many, the real explanation is attention-deficit/hyperactivity disorder (ADHD), a common and treatable condition that is easy to miss, especially in girls and adults.This guide explains what ADHD is, the types, the symptoms in children, teenagers and adults, causes, how it is diagnosed, what treatment involves, and how ADHD links with anxiety, depression and substance use. It is general information, not medical advice or a diagnosis.
In short
  • ADHD is a neurodevelopmental condition that affects attention, activity levels and impulse control. It is not a result of poor parenting, laziness or too much sugar or screen time.
  • There are three presentations: mainly inattentive, mainly hyperactive-impulsive and combined.
  • Symptoms start in childhood and appear in more than one setting, such as home and school. Many people are not diagnosed until adulthood.
  • ADHD is treatable, with medication, behavioural strategies, therapy and support.
  • Untreated ADHD is linked with higher rates of anxiety, depression and substance use, so getting assessed matters.

What is ADHD?

ADHD is a neurodevelopmental condition recognised in the DSM-5-TR and the WHO’s ICD-11. It involves a persistent pattern of inattention, hyperactivity and impulsivity that is more than expected for the person’s age and that interferes with daily life. It reflects differences in how the brain manages attention, planning, self-control and motivation, sometimes described as “executive function.”It is estimated to affect around 5% of children and 2 to 3% of adults worldwide. Boys are diagnosed more often than girls, but this partly reflects that girls more often have the quieter, inattentive type and are missed.

Types of ADHD

PresentationWhat it looks like
Predominantly inattentiveTrouble focusing, organising and finishing tasks, forgetfulness and daydreaming, with little obvious hyperactivity. Often missed, especially in girls and women.
Predominantly hyperactive-impulsiveConstant movement, fidgeting, talking a lot, interrupting and acting without thinking
CombinedSignificant symptoms of both inattention and hyperactivity-impulsivity
The presentation can change over time. Hyperactivity often becomes less obvious with age, turning into inner restlessness, while attention and organisation problems continue.

What are the symptoms of ADHD?

InattentionHyperactivity and impulsivity
Makes careless mistakes, overlooks detailsFidgets, taps hands or feet, squirms in the seat
Has trouble staying focused on tasks, lessons or readingLeaves their seat when they’re expected to stay seated
Seems not to listen when spoken to directlyRuns, climbs or feels restless, even when it’s inappropriate
Doesn’t follow through on instructions or finish tasksHas trouble playing or doing activities quietly
Has difficulty organising tasks, time and belongingsIs “always on the go” as if driven by a motor
Avoids or dislikes tasks that need sustained effortTalks excessively
Often loses things such as keys, books, phones or documentsBlurts out answers, finishes others’ sentences
Is easily distractedHas trouble waiting their turn
Is forgetful in daily activitiesInterrupts or intrudes on others
Everyone has some of these sometimes. For ADHD, symptoms are persistent, begin before age 12, occur in at least two settings such as home, school or work, and clearly interfere with functioning. Children are generally expected to show at least six symptoms in either group, and adults and older teenagers at least five.

ADHD across ages

AgeWhat you may notice
Young childrenConstant motion, difficulty sitting for stories or meals, impulsive or risky behaviour, tantrums, trouble taking turns
School-age childrenIncomplete homework, careless mistakes, losing belongings, disrupting class, daydreaming, difficulties with friendships
TeenagersDisorganisation, poor time management, forgetfulness, procrastination, risk-taking, conflict at home, falling grades
AdultsChronic lateness, missed deadlines, difficulty prioritising, forgetting appointments, restlessness, impulsive spending or decisions, frustration, job or relationship strain
Girls and womenOften inattentive and internalised: daydreaming, disorganisation, overwhelm, anxiety, low self-esteem, “trying twice as hard” to cope. Frequently misread as anxiety, depression or “being scatterbrained.”

Emotional and everyday effects

  • Emotional ups and downs: quick frustration, mood swings and sensitivity to criticism
  • Time blindness: difficulty sensing how long things take, leading to lateness
  • Hyperfocus: intense absorption in interesting activities, with difficulty switching away
  • Procrastination and boredom: struggling to start tasks that aren’t stimulating
  • Sleep problems: trouble winding down, and a late body clock
  • Low self-esteem: years of being labelled “lazy” or “careless”

Is it ADHD, or something else?

Many conditions can look like ADHD, and many occur alongside it, so a proper assessment is important.
ConditionHow it relates
Normal childhood energyActive children can usually focus when interested and settle when asked. In ADHD, symptoms are persistent and across settings.
AnxietyWorry can cause restlessness and poor concentration. See is anxiety a psychological disorder
DepressionLow mood can impair concentration and energy. See is depression a mental disorder
Sleep problemsPoor sleep or sleep apnoea can cause inattention and irritability. See types of sleep disorders
Autism or learning difficultiesThese can look similar or occur together with ADHD
Trauma and stressCan cause hypervigilance, poor focus and impulsivity
Medical issuesVision or hearing problems, thyroid problems, anaemia or some medicines can affect attention
Substance useAlcohol, cannabis, stimulants and other drugs can cause inattention and restlessness

What causes ADHD?

  • Genetics: ADHD is highly heritable, and often runs in families
  • Brain development and chemistry, including differences in brain regions and chemical messengers involved in attention and self-control
  • Pregnancy and birth factors, such as premature birth, low birth weight, and prenatal exposure to alcohol or tobacco
  • Environmental factors, such as early exposure to lead or severe early adversity, which may contribute in some cases
ADHD is not caused by sugar, screen time, bad parenting or lack of discipline, although an unsupportive environment can make symptoms harder to manage.

How is ADHD diagnosed?

A psychiatrist, paediatrician, developmental specialist or clinical psychologist usually makes the diagnosis. There is no single test. The assessment typically involves:
  1. A detailed history of symptoms, when they began, and how they affect home, school or work
  2. Information from several people, such as parents, teachers, partners or school reports, and, for adults, childhood history
  3. Rating scales or questionnaires, such as Vanderbilt or Conners for children, and the Adult ADHD Self-Report Scale for adults
  4. A check for other conditions, including anxiety, depression, sleep, learning and medical problems, and substance use
  5. Medical checks, such as vision, hearing and, where needed, blood tests
If you’d like a private starting point, our confidential self-screening is available for mental health concerns. It is not a diagnosis of ADHD.

How is ADHD treated?

ApproachWhat it does
MedicationStimulant and non-stimulant medicines can reduce symptoms and improve focus and self-control in many people. They are prescribed and monitored by a doctor, and should not be used without a prescription or shared.
Behavioural strategies and parent trainingTeaches parents routines, clear rules, rewards and consistent responses, and helps children build skills
TherapyCognitive behavioural therapy helps teenagers and adults with planning, time management, unhelpful thoughts and emotions. See our schools of therapy.
School and workplace supportSeating, breaks, written instructions, extra time and organisation help
Lifestyle supportRegular sleep, exercise, balanced meals and reduced screen time. See exercise for mental health and how to stay mentally healthy
Treating co-occurring conditionsAddresses anxiety, depression, sleep problems and substance use alongside ADHD
Treatment is tailored to age and needs. A combination of approaches generally works best, and a doctor will review it over time.

Everyday strategies that help

  • Use external structure: calendars, alarms, checklists and labelled places for important things
  • Break tasks into small steps, with short deadlines
  • Use body doubling: working alongside someone else can help you start and stay on task
  • Build routines for sleep, meals, homework and mornings
  • Reduce distractions, such as silencing notifications while working
  • Move often: short activity breaks help focus
  • Praise effort and progress, especially for children who have heard a lot of criticism
  • Practise mindfulness, which can help some people notice drifting attention. See mindfulness for wellbeing

ADHD and substance use

People with ADHD, especially when it is undiagnosed or untreated, have a higher risk of developing problems with nicotine, alcohol, cannabis and other drugs. Reasons include impulsivity, seeking stimulation, self-medicating restlessness or low mood, and difficulty with consequences. Substances can in turn worsen attention, sleep, mood and memory. If ADHD and substance use occur together, treating both gives the best results. See dual diagnosis and how to come out of addiction. Don’t use someone else’s ADHD medicine, and discuss any substance use openly with your doctor, since it affects safe treatment choices.

Practical tips for India

  • “Lazy,” “careless” and “naughty.” These labels are common and hurtful. ADHD is a health condition, and understanding it changes how families and teachers respond.
  • Academic pressure. Marks-driven schooling and tuition culture can magnify ADHD difficulties. Talk to teachers and ask about adjustments such as breaks, seating and extra time.
  • Finding specialists. Child psychiatrists and developmental paediatricians are mostly in larger cities. Your family doctor can refer you, and online consultations may help.
  • Medication worries. Many parents worry about medicines, and these concerns are valid. A doctor can explain the benefits, side effects and monitoring.
  • Adults. Many adults are diagnosed after their child is, and recognise their own history. It is never too late to be assessed.
  • Stigma and “log kya kahenge.” Fear of judgement delays assessment. Choose confidential services.
  • Free support. Tele-MANAS (14416) offers free tele-mental-health support in India.

When to get professional help

Please speak to a doctor or mental health professional if:
  • Inattention, restlessness or impulsivity are persistent and affect school, work or relationships
  • A teacher or colleague has raised repeated concerns
  • You have always struggled with organisation and time, and it is affecting your life
  • Low mood, anxiety or low self-esteem have developed
  • You are using alcohol, cannabis or other substances to cope
  • There is risky behaviour, driving problems or accidents
If you or someone you know is thinking about ending their life, please reach out now. In India, Tele-MANAS (14416) is a free national helpline, and in an emergency you can call 112 or go to the nearest hospital.

Special situations

Girls and women. ADHD is often missed or mislabelled as anxiety or depression. Hormonal changes during puberty, pregnancy and menopause can affect symptoms.Teenagers. Risk-taking, substance experimentation, driving and academic pressure make support especially important. Stay involved without being punitive.Adults diagnosed late. It’s common to feel relief, grief and anger about the years without help. Support and treatment can improve work, relationships and self-esteem.OCD and ADHD together. The conditions can overlap. See how can I know if I have OCD.

When coping starts to harm

  • Using alcohol, cannabis or other drugs to calm restlessness or “switch off”
  • Relying on large amounts of caffeine or energy drinks to focus
  • Taking someone else’s prescription stimulant
  • Gambling, gaming or scrolling for hours as an escape from tasks
  • Avoiding responsibilities until they become crises
If this sounds familiar, it is a sign to reach out, not a reason for shame.

If you’re supporting someone with ADHD

Be patient, clear and consistent. Give short instructions one at a time, use routines and visual reminders, praise effort, and avoid shaming. Learn about ADHD together, and look after your own wellbeing too.

How Thamarai can help

ADHD often occurs alongside anxiety, low mood, sleep problems and substance use. At Thamarai Healing Center in Pollachi, our mental health program offers confidential, personalised assessment and guidance, and support for co-occurring mental health conditions and substance use, in a calm setting among the foothills of the Western Ghats. If you are unsure whether to see a psychiatrist, a confidential conversation can help you understand the next step.Speak to our team confidentially →

Frequently asked questions

What is ADHD and its symptoms?

ADHD is a neurodevelopmental condition affecting attention, activity and impulse control. Symptoms include trouble focusing, forgetfulness, disorganisation, restlessness, talking excessively and acting without thinking, appearing in more than one setting and interfering with daily life.

What are the three types of ADHD?

Predominantly inattentive, predominantly hyperactive-impulsive and combined presentation.

What are the signs of ADHD in adults?

Chronic lateness, missed deadlines, difficulty prioritising, forgetfulness, inner restlessness, impulsive decisions, procrastination and frustration, with strain at work or in relationships.

What causes ADHD?

A mix of genetics, brain development, and pregnancy and birth factors such as premature birth. It is not caused by sugar, screens or bad parenting.

How is ADHD diagnosed?

By a specialist, through a detailed history, information from several people, rating scales and a check for other conditions. There is no single test.

Can ADHD be cured?

ADHD isn’t cured, but it is very treatable. Medication, behavioural strategies, therapy and support help many people manage symptoms and thrive.

Can adults develop ADHD?

ADHD begins in childhood, but many adults are diagnosed for the first time later, once demands increase or when symptoms were missed earlier. New attention problems in adults should also be checked for other causes.

Is treatment at Thamarai confidential?

Yes. Enquiries, assessments and treatment are handled confidentially, and you can call to ask questions without committing to anything.

This article is for general information and isn’t a substitute for professional medical advice, diagnosis or treatment.

Sources

  • American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR). 2022. Attention-Deficit/Hyperactivity Disorder.
  • World Health Organization. International Classification of Diseases, 11th Revision (ICD-11), 6A05 Attention deficit hyperactivity disorder.
  • National Institute for Health and Care Excellence (NICE). Attention deficit hyperactivity disorder: diagnosis and management (NG87). 2018.
  • Faraone SV, et al. Attention-deficit/hyperactivity disorder. Nature Reviews Disease Primers, 2015.
  • Polanczyk G, et al. The worldwide prevalence of ADHD: a systematic review and metaregression analysis. American Journal of Psychiatry, 2007.
  • Kessler RC, et al. The World Health Organization Adult ADHD Self-Report Scale (ASRS). Psychological Medicine, 2005.
  • Ministry of Health and Family Welfare, Government of India. Tele-MANAS (14416).

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