What Conditions Can Co-occur With ADHD?

More than two-thirds of children and young people with ADHD will have at least one coexisting condition. Just as ADHD can present many challenges in your child’s life, other conditions can be just as difficult and may require specialist intervention, particularly in learning environments. ADHD can also exist with one or more different conditions.

Oppositional Defiance Disorder (ODD) research has shown that up to 40% of children and young people with ADHD can experience this. ODD can include a regular pattern of arguing, losing one’s temper, refusing to follow rules, blaming others, deliberately annoying others, and being angry, resentful, spiteful, and vindictive.

Up to 30% of children and young people with ADHD can experience high levels of anxiety, and this often carries on into adulthood. This can manifest as constant, excessive worrying, often leading to feeling stressed out, tired, and having difficulty sleeping.

Between 60% to 80% of children and young people with Tourette’s Syndrome have ADHD. Tics can occur in up to 10% of those who have ADHD. Tics involve sudden, rapid, recurrent and involuntary movements or vocalisations. Tourette’s Syndrome can involve a more severe tic disorder in which repetitive movements and vocalisations occur on an almost daily basis for years.

Between 25% - 50% of children and young people with ADHD will experience difficulties with sleep. These difficulties can include falling asleep and staying asleep. Lack of sleep will exacerbate the symptomology of ADHD and have an impact on mental health.

This condition is sometimes also known as Sensory Processing Disorder. This is a neurological condition that impairs the body’s ability to receive signals from the senses. Children and young people can feel overwhelmed by competing sensory experiences, such as conversations occurring alongside flashing lights. Research shows that up to 10% of children and young people will have some type of sensory integration challenge, and this can be very common in children and young people with ADHD.

Autism is a neurodevelopmental condition characterised by difficulties in social interaction and communication, and by restricted and repetitive patterns of thought and behaviour.

Dyslexia is a condition which causes difficulties in learning to read and interpret words, letters and other symbols. It also causes impairments in information processing, that is, having difficulties in processing and remembering information that is seen or heard.

Dysgraphia is a specific learning disability which affects writing. It can cause difficulties in spelling, writing production and getting thoughts on paper. It is estimated to affect between 20%- 60% of children and young people with ADHD, and often co-occurs with other motor and/ or processing challenges.

Dyscalculia is a learning difficulty that affects a child’s ability to acquire mathematical skills, for example, understanding basic number concepts and/or number relationships, recognising symbols, and undertaking number-based problems.

Dyspraxia is a neurodevelopmental condition which causes difficulties in activities requiring coordination and movement. Possible signs include poor hand-eye coordination, writing difficulties and balance issues.