Trouble with transitions, among other signs, is one of the hallmarks of autism and ADHD that often overlap. Restricted and Repetitive Behaviors include insistence on sameness, inflexible adherence to routines, or ritualized patterns of verbal or nonverbal behavior, so much so that autistic children may feel extreme distress with small changes in their routines and may struggle with transitions. Difficulty with transitions, which sometimes results in meltdowns and temper tantrums, is also a common challenge in ADHD. In ADHD, inattention, distractibility, and hyperfocus are common manifestations, and executive functioning challenges are also common across both conditions. Social challenges, impulsivity, distractibility, difficulty sustaining attention, excessive talking, and interrupting are often behind social challenges that many children with ADHD experience. Sensory processing differences, such as sensitivity to sounds, textures, smells, foods, lighting, and touch, are commonly seen across ADHD and autism, and this may also contribute to struggles with transitions. While both conditions share similar challenges, they are separate conditions or neurotypes, and ADHD is not part of the autism spectrum. Despite the overlap, it is essential to evaluate each condition separately to provide proper support and interventions. Telling apart symptoms of ADHD from autism can be tricky, as both neurotypes can share similar signs or traits.