Extreme Demand Avoidance (also referred to as Pathological Demand Avoidance), is a behavioural profile occurring within the context of a neurodevelopment diagnosis, commonly in the autism spectrum conditions. The core feature is, as the name suggests, an extreme degree of avoidance due to very high anxiety. An individual will refuse, avoid, negotiate around, procrastinate and melt-down in response to perceived commands or pressures from others and from self. This has an impact on intervention, as the advice and strategies commonly helpful in cases of autism fail and even antagonize difficult behaviours. Correct understanding is vital to appropriately and helpfully approach cases of EDA.