Is ADHD considered a physical challenge or emotional challenge or none

Both.

http://psychcentral.com/lib/causes-of-attention-deficit-disorder-adhd/0001202

ADHD, which stands for Attention-Deficit/Hyperactivity Disorder, is primarily considered a neurodevelopmental disorder rather than a physical or emotional challenge. It affects the brain's executive functions, which include the ability to pay attention, regulate impulses, and manage behaviors. These difficulties can manifest in various ways, such as inattention, hyperactivity, or impulsivity.

While ADHD primarily affects cognitive and behavioral processes, it does not necessarily stem from a physical or emotional cause. It is generally believed to result from a combination of genetic, environmental, and neurological factors. Therefore, it is considered a neurological or neurobiological condition rather than being strictly physical or emotional in nature.

It is important to note that individuals with ADHD may experience emotional challenges and coexisting conditions such as anxiety or depression. However, these emotional challenges are often a result of the difficulties in managing ADHD symptoms rather than being the primary cause of the disorder itself.