ADHD and Sensory Processing: Why Everything Feels Like Too Much (or Not Enough)

When the World Is Too Loud, Too Bright, Too Much

Has anyone ever told you that you are "too sensitive"? That you overreact to sounds, textures, or lights that do not bother anyone else? That you are being dramatic when the seam of your sock makes you want to scream or the buzz of a fluorescent light makes concentration impossible?

You are not being dramatic. You are experiencing sensory processing differences, and they are incredibly common in ADHD.

Research by Ghanizadeh (2011, Psychiatry Investigation) and more recent studies have consistently found that sensory processing difficulties are significantly more prevalent in people with ADHD than in the general population. This is not a separate condition for most people, it is part of how the ADHD brain processes information from the environment.

What Is Sensory Processing and Why Does ADHD Affect It?

Your brain is constantly receiving sensory information: sounds, sights, textures, smells, temperatures, movement. A neurotypical brain automatically filters this information, prioritising what matters and ignoring what does not. The hum of the fridge, the feel of your clothes, the background traffic noise, all filtered out without conscious effort.

ADHD brains struggle with this filtering. The same executive function and attention regulation systems that make it hard to focus on a boring task also make it hard to filter out irrelevant sensory input. The result is that your brain tries to process everything at once, and it gets overwhelmed.

This can show up in two seemingly opposite ways:

Sensory Hypersensitivity (Too Much)

This is when sensory input feels amplified, overwhelming, or physically uncomfortable:

• Sound: Cannot filter background noise, specific sounds trigger intense distress (misophonia), noisy environments are exhausting
• Touch: Clothing tags, seams, and certain fabrics feel unbearable; light touch can feel irritating while firm pressure feels calming
• Light: Fluorescent lights are particularly problematic, bright lights cause headaches or difficulty concentrating
• Smell: Strong smells cause nausea or intense distraction
• Taste/texture: Food texture sensitivity, only able to eat certain foods prepared certain ways

Sensory Hyposensitivity (Not Enough)

This is when your brain craves more sensory input than it is receiving:

• Fidgeting constantly because your body needs movement stimulation
• Seeking loud music, intense flavours, or strong physical sensations
• Not noticing pain, temperature, or hunger until it is extreme
• Needing to touch things, pick at skin, or chew on things

Many ADHD adults experience both at different times or for different senses. You might be hypersensitive to sound but hyposensitive to body signals like hunger. This dual pattern is part of what makes it confusing.

Misophonia: When Sounds Trigger a Fight-or-Flight Response

Misophonia, an intense emotional reaction to specific trigger sounds, deserves special mention because it is extremely common in ADHD and profoundly affects daily life. Common triggers include:

• Chewing, crunching, or slurping sounds
• Pen clicking or keyboard tapping
• Sniffing or throat clearing
• Bass through walls
• Certain voices or speech patterns

The reaction is not annoyance. It is a genuine fight-or-flight response: rage, panic, the urge to flee or lash out. Research suggests that misophonia involves the same amygdala hyperactivation seen in ADHD emotional dysregulation, meaning the trigger sounds bypass rational processing and go straight to the emotional brain.

If you have ADHD and experience this, you are not overreacting. Your brain is literally processing these sounds as threats.

Sensory Overload: What It Feels Like

Sensory overload is what happens when the incoming sensory information exceeds your brain's ability to process it. For ADHD brains, this threshold is lower than neurotypical brains. Common triggers include:

• Busy, noisy environments (shopping centres, restaurants, open-plan offices)
• Multiple people talking at once
• Combination of strong sensory inputs (bright lights plus noise plus crowds)
• Prolonged exposure to moderately stimulating environments (eight hours in an office)

When it hits, it can feel like:

• A desperate need to escape
• Irritability or anger that seems disproportionate
• Inability to think or speak clearly
• Physical symptoms (headache, nausea, muscle tension)
• Shutting down or going quiet
• Tearfulness

The aftermath is exhaustion. After a sensory overload episode, you may need hours or even days to recover. This is not weakness, it is your nervous system resetting after being overwhelmed.

Practical Strategies for Managing Sensory Processing

Your Sensory Toolkit

Environmental Adjustments

If your workplace triggers sensory overload, many of these strategies count as reasonable adjustments under the Equality Act 2010:

• Working in a quieter area or facing a wall rather than an open space
• Using noise-cancelling headphones during focused work
• Adjusting lighting at your workstation
• Taking regular sensory breaks
• Working from home on days that require deep focus

Daily Management

• Build sensory breaks into your day before you hit overload, not after
• Know your triggers and plan around them where possible
• Batch social and stimulating activities rather than spreading them across the week
• Protect your recovery time after high-stimulation events
• Communicate your needs to the people in your life, most people will accommodate once they understand

You Are Not "Too Sensitive"

The phrase "too sensitive" implies that there is a correct amount of sensitivity and you have exceeded it. That framing is unhelpful. Your nervous system processes sensory information differently. That is a neurological fact, not a character flaw.

If sensory processing issues are significantly affecting your daily life, having someone help you develop practical strategies can make an enormous difference. Book a free discovery call and let us work out what would help most.