Light & Noise Sensitivity After Concussion

Why does everything feel too loud and too bright?

After a concussion, many people find that lights feel glaring, screens are hard to look at, and normal background noise becomes exhausting. Grocery stores, open offices, restaurants, even a sunny day — environments that never bothered you before — suddenly feel overwhelming.

This isn't imagined and it isn't anxiety. Sensory sensitivity after concussion is a real neurological symptom caused by the brain's reduced ability to filter and process sensory input. The injury temporarily lowers the threshold at which sensory information becomes uncomfortable, meaning your brain gets overloaded by stimuli it previously handled effortlessly.

What causes post-concussion sensory sensitivity

• Central processing disruption — the brain's sensory gating mechanisms are temporarily impaired, allowing more raw input through than it can comfortably handle
• Vestibular-visual mismatch — when your vestibular system and visual system send conflicting signals, busy visual environments become disorienting and nauseating
• Oculomotor dysfunction — impaired eye movement control makes screens, scrolling, and fluorescent lighting particularly difficult to tolerate
• Autonomic dysregulation — disruption to the nervous system's ability to regulate arousal means the brain stays in a heightened state, making all input feel amplified
• Migraine mechanisms — concussion can trigger or worsen migraine pathways, which are closely tied to light and sound sensitivity

How sensory sensitivity affects daily life

This symptom can be deeply disruptive. Patients often describe having to wear sunglasses indoors, avoiding social situations, being unable to use their phone or computer, or retreating to dark, quiet rooms for hours. It affects work, social life, and mental health.

The instinct to avoid all triggering environments is understandable — but prolonged avoidance can actually make sensitivity worse by preventing the brain from recalibrating. The key is graded, controlled exposure guided by a professional.

How we treat sensory sensitivity

Treatment targets the underlying causes identified in your assessment:

• Vestibular rehabilitation — retraining visual-vestibular integration to reduce overwhelm in busy environments
• Oculomotor exercises — improving eye movement control to increase screen and reading tolerance
• Graded sensory exposure — systematic, controlled increases in light and noise exposure to raise your tolerance threshold
• Cervical spine treatment — neck dysfunction can amplify sensory sensitivity through its connections to the brainstem
• Activity and environment modification — practical strategies for managing triggers while treatment takes effect

It gets better

Sensory sensitivity is one of the symptoms that patients find most distressing — but it's also highly responsive to the right treatment. Most patients see meaningful improvement as the underlying vestibular, oculomotor, and cervical issues are addressed. The goal isn't just coping — it's getting back to a point where normal environments feel normal again.