An autistic meltdown is an intense response to overwhelming stimuli, often triggered by sensory overload, emotional distress, or a combination of both. Unlike tantrums, which are typically deliberate and goal-oriented, meltdowns are involuntary reactions to stressors that the individual struggles to cope with. These meltdowns can manifest in a variety of ways, such as crying, screaming, self-harm, or even withdrawal. Download our free guide below. Instant Access.