Overload is information, not failure
An overloaded nervous system is one that has taken in more than it can process right now. That might be too much stress, too much noise, too many demands, too little rest, or old trauma being stirred up by something in the present.
Learning your own signs is one of the most useful things you can do. When you can notice overload early, you have more options for responding to it.
Signs you might be above your window (hyperarousal)
- Heart racing, chest tight or breathing fast and shallow
- Feeling on edge, jumpy or easily startled
- Irritability, snapping at people or feeling like you might explode
- Racing thoughts or not being able to focus
- Trouble falling or staying asleep
- Clenched jaw, tight shoulders, headaches or stomach upsets
- Scanning the room, needing to know where the exits are
- Feeling an urgent need to escape
Signs you might be below your window (hypoarousal or shutdown)
- Feeling numb, flat or empty
- Heavy tiredness that sleep does not fix
- Brain fog, losing words or not being able to think
- Feeling disconnected from your body or like things are not real
- Struggling to start tasks, even ones you care about
- Pulling away from people, messages and appointments
- Going quiet or losing speech
Many people move between both states. You might feel wired and exhausted at the same time, sometimes called “tired but wired”. That is common and it makes sense.
Sensory overload and neurodivergence
For autistic people, people with ADHD and others with sensory processing differences, overload can come from the environment itself. Bright lights, background noise, crowds, strong smells, scratchy clothing or lots of conversation can build up until the brain is flooded.
When someone is flooded with sensory input or anxiety, the brain can move into a fight, flight or freeze response (Leicestershire Partnership NHS Trust). A meltdown is an involuntary response to overwhelming stress or sensory input, not a behaviour problem (Autism Society). A shutdown can look like becoming non-responsive or non-speaking, and has been described as feeling like running out of power (Autistic Girls Network).
Trauma and neurodivergence often overlap. Many neurodivergent people carry trauma from years of being misunderstood, corrected or forced to mask. Both deserve respect and neither needs to be “fixed” out of you.
When your body signals are hard to read
Some people find it hard to notice what is happening inside their body until it is already big. This relates to interoception, which is how we sense internal signals like hunger, thirst, heart rate and emotions. Trauma can disrupt how well a person perceives and trusts their body’s signals (WPS).
If this is you, external cues can help. Timers, checking in at set times of day, noticing patterns in a journal or having a trusted person gently name what they see can all build awareness over time. External supports are just as valid as internal ones (National Autistic Society).
A gentle exercise: your early warning signs
Over the next week, try noticing:
- Your first sign. What is the earliest thing you notice when overload is starting? It might be a tight jaw, getting snappy with the dog or scrolling your phone without taking anything in.
- Your middle signs. What happens when it builds?
- Your “too late” signs. What happens when you have gone over the edge?
There are no wrong answers. This list becomes the foundation of your regulation plan, which we cover in the final post of this series.
How MHRC can help
Recovery coaches can help you map your patterns, including the times, places and situations that tend to tip you into overload. From there, we work with you on practical changes to your routines, environment and supports.
Call to action: Want help understanding your overload patterns? Contact MHRC for a no-pressure conversation.
If you need support now: Lifeline 13 11 14, 13YARN 13 92 76, or 000 in an emergency.
Sources
- Understanding autistic meltdowns and shutdowns. Leicestershire Partnership NHS Trust
- Autistic meltdowns and shutdowns. Autism Society
- Meltdowns, shutdowns and burnout. Autistic Girls Network
- Autism in adults: how trauma affects interoception and anxiety. WPS
- Interoception and mental wellbeing in autistic people. National Autistic Society