When Everything Feels LOUD: Sensory Overload, Hypermobility, and the Nervous System
Smells that didn't used to bother you. Lights that feel aggressive. Sounds in the background of a restaurant that make it impossible to track a conversation. Fabric that felt fine this morning but by 3pm is genuinely intolerable.
If this is your experience, you're not imagining it. And you're not becoming more fragile. Your nervous system is managing a load that most nervous systems don't have to manage — and sensory input is part of that load.
This post is about why that happens, why it's more common in people with hypermobility, dysautonomia, and MCAS, and what actually helps.
Everything feels loud
That's the phrase I hear most often from people in this community. Not "I'm sensitive to noise" or "I prefer dim lighting." Everything feels LOUD — the smells, the sounds, the lights, the textures. All of it turned up to eleven, all the time, and often without warning.
This isn't a personality trait. It isn't anxiety, though it can look like anxiety from the outside and often gets mislabeled as such. It's a nervous system that has had its gain turned up — responding to inputs at a higher amplitude than the same inputs would produce in a different body.
Understanding why that happens is the first step to managing it, because the management strategy looks very different depending on whether you think you're oversensitive or whether you understand you're overloaded.
What's happening in the nervous system
The autonomic nervous system is constantly filtering sensory input — deciding what to flag as important, what to ignore, and what to respond to. In a well-regulated nervous system, most background sensory input stays in the background. The hum of the air conditioning doesn't register. You don't taste your colleague's cologne in your mouth while trying to eat lunch.
In dysautonomia and POTS, the autonomic nervous system is already working harder than average to regulate basic functions — heart rate, blood pressure, temperature, digestion. Research on POTS also suggests it may involve disordered interoceptive processing, where the brain has difficulty making sense of incoming body signals. When the autonomic nervous system is dysregulated, sensory processing is often dysregulated alongside it. What would have been background noise becomes foreground noise.
MCAS adds another layer. Mast cells are present throughout the nervous system as well as in skin, gut, and airways. When mast cell activation is elevated — triggered by stress, hormonal fluctuation, heat, or any number of environmental inputs — inflammatory mediators are released that can directly sensitize nerve endings and lower sensory thresholds. Smells trigger reactions because mast cells are present in nasal mucosa and throughout the nervous system, primed to respond to airborne triggers. Skin reacts to fabric or heat because of mast cells on guard within the dermis.
Hypermobility adds a third layer. Proprioceptive deficits are well-documented in hEDS and HSD; when the nervous system is working with unreliable positional information, it may have less capacity available for other processing.
Put all three together and you have a nervous system that's already working harder than most, with a lower threshold for sensory activation. Everything being loud isn't just a metaphor. It's what happens when the system's capacity is saturated.
Why perimenopause makes it worse
Estrogen modulates mast cell behavior directly, and fluctuating estradiol levels correlate with worsening of mast cell–related conditions. Estrogen also affects autonomic function. As estrogen becomes more volatile in perimenopause — fluctuating rather than declining on a predictable curve — both systems can destabilize.
Many people in this population describe a distinct shift during perimenopause: sensory experiences that were manageable before becoming genuinely overwhelming. Restaurants that were fine are now too much. Perfume counters that were navigable are now a physical reaction waiting to happen. The threshold didn't move because something went wrong. It moved because the hormonal regulation that was holding it in place became less consistent.
This is one of the reasons the Bendy Menopause community exists; the intersection of hypermobility, dysautonomia, MCAS, and hormonal transition creates a sensory experience that generic menopause advice, and generic chronic illness advice, both miss.
This is load management, not avoidance
Here's the reframe that matters most: managing sensory input isn't the same as avoiding life.
I'll be honest — I resisted this reframe myself for a long time. I knew noise-canceling headphones existed. I didn't use them. I thought I should be able to push through it. A colleague of mine, Sarah Woodward, DPT, clocked this pattern immediately when we were talking and said something that stopped me: "Yes, I think that implicit ableism is very common in the medical community." She was right. The belief that needing accommodations is a personal failing — that a well enough person would just manage — is pervasive, and it runs especially deep in people trained to push through discomfort as a professional virtue. It keeps people white-knuckling through environments that are genuinely costing them, when a pair of headphones or a different seat in the restaurant would have changed the whole afternoon.
Pacing physical activity — matching what you do to what your body can actually recover from — is understood as a legitimate management strategy for variable-capacity bodies. Nobody calls pacing avoidance. Sensory management is the same category of intervention. You're matching sensory input to what your nervous system can actually process without tipping into dysregulation.
When sensory load stays below your threshold, your nervous system has more capacity available — for movement, for social engagement, for cognitive function, for recovering from other demands. When sensory load consistently exceeds your threshold, everything else gets harder: pain amplifies, fatigue deepens, emotional regulation suffers, and the nervous system stays in a reactive state that makes the next sensory input even harder to handle.
Managing sensory input is not about becoming more restricted. It's about protecting nervous system capacity so you can use it for what matters.
Identifying your personal sensory load
Sensory triggers are individual. What's costly for one person may be irrelevant to another. The first step is identifying which inputs reliably tip your system — not to avoid them forever, but to know what you're working with.
Common high-cost inputs in this population:
Sound: background noise in busy environments, multiple simultaneous conversations, high-frequency sounds (certain music, alarms, certain voices), unpredictable noise.
Light: fluorescent lighting, overhead lighting in general, screens at full brightness, sunlight without warning, flickering light.
Smell: synthetic fragrance (perfume, cleaning products, candles, air fresheners), food smells in enclosed spaces, chemical smells.
Texture and touch: clothing labels, seams, certain fabrics, unexpected touch, tight waistbands, anything that requires ongoing tolerance rather than a one-time adjustment.
Temperature and humidity: heat is particularly costly for POTS and dysautonomia; temperature transitions can also be significant.
Tracking which inputs correlate with symptom flares — using your symptom tracker — can reveal patterns that aren't obvious in the moment. The headache that appears every time you're in a certain store may not be a coincidence.
What actually helps
Reduce the highest-cost inputs first. You don't need to manage every sensory input. Identify the two or three that cost the most — the ones that reliably produce a reaction or a crash — and start there. Noise-canceling headphones for a background noise sensitivity. Sunglasses inside for fluorescent light sensitivity. Fragrance-free products at home if synthetic scent is a consistent trigger.
Build transitions into your environment. Moving from a low-stimulus environment to a high-stimulus one without a transition is harder on the system than moving gradually. A few minutes in a quieter space before entering a busy one, dimming lights before sleep, reducing inputs sequentially rather than all at once — these are small structural changes that reduce the spike.
Treat sensory rest as real recovery. Time in a low-stimulus environment — quiet, dim, without demands — is not doing nothing. It's allowing the nervous system to process accumulated input and return toward its baseline. This is especially important after high-sensory events: a crowded social gathering, a medical appointment, a busy workday. Building in sensory rest afterward isn't indulgence. It's recovery.
Name it in relationships and at work. This is often the hardest part. Sensory needs are invisible, and explaining them without a framework tends to produce skepticism or advice to "just push through." But most people, when given the information, genuinely want to help. Your colleague wearing the cologne that gives you a headache almost certainly has no idea. A simple, matter-of-fact mention — "I have a condition that makes me really reactive to fragrance, would you mind skipping it when we're in meetings together?" — lands differently than suffering in silence and then crashing afterward. Most people say yes immediately. The same applies to lighting at a shared desk, noise levels in a shared space, or a friend choosing a quieter restaurant. People can't accommodate what they don't know about.
Having language for what's happening — your nervous system is managing more than average, sensory input is part of that load, reducing certain inputs reduces your overall symptom burden — gives you and the people around you something concrete to work with. This isn't a request for special treatment. It's information that lets the people around you actually show up for you.
The bigger picture
Sensory Boundaries is one of the early habits in the nervous system resilience module of The BENDY Method — and it's sequenced deliberately. It builds on the regulation practice that comes before it, and it protects the capacity that everything after it depends on. Reduce what's going in. Strengthen the system's ability to handle it.
The BENDY Method is a 12-week habit-based course for perimenopause and menopause in bodies with hEDS, HSD, MCAS, POTS, dysautonomia, and related presentations.
Join the waitlist to be first to know when enrollment opens.
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