Sensory Sensitivity

Sensory sensitivity in ME/CFS is not usually about any one dramatic trigger — it is that ordinary, unremarkable input starts to register more strongly. Depending on the person, this may include:

• Light — overhead lighting feeling harsh, bright rooms or sunshine becoming uncomfortable, flickering or stark lighting becoming difficult
• Sound — normal conversation becoming difficult to follow, household noise feeling unusually intrusive, appliances or traffic demanding attention they never used to
• Touch — certain fabrics, seams, labels, light pressure or casual contact becoming uncomfortable
• Smell — cooking, perfumes, cleaning products or previously tolerated scents becoming hard to bear
• Movement — busy rooms, passing traffic or moving visual activity becoming harder to watch comfortably
• Visual clutter — patterned spaces, crowded shelves, rooms with many objects competing for attention
• Busy environments — supermarkets, cafés, schools and stations, where several of these arrive together
• Several inputs happening at once — where one sound, one light and one conversation are each manageable alone but together feel demanding

Nobody experiences all of these, and the pattern is often selective: one person's difficulties may centre on sound while another's centre on light and texture. These experiences are not specific to ME/CFS, but they are commonly reported by people with the illness.

Reduced sensory tolerance is rarely a fixed setting. People often describe it changing along several axes at once:

• Within a day — fine in the morning, unable to tolerate the same room by the afternoon
• From one day to another — a supermarket trip that was manageable last week feeling impossible this week
• During PEM or a flare — tolerance often becomes noticeably more limited when symptoms are already worse
• Between senses — sound and light may be the clearest difficulties for one person, smell and touch for another

This variability is part of the experience, not a contradiction of it. A person is not being inconsistent when a room was tolerable on Tuesday and is not on Friday — the amount of input may be identical while the tolerance for it has changed.

Because the shift is towards ordinary input, the examples tend to be everyday ones:

• Switching off the overhead light in favour of a lamp, without anyone else in the house understanding why
• Finding a normal conversation at the kitchen table harder to follow than the content of it should warrant
• The fridge hum, a neighbour's music or a pet moving about suddenly taking up attention they never used to occupy
• Avoiding the kitchen while certain foods cook, or moving away from a colleague's perfume
• Reaching for softer clothing, cutting out labels, or finding hugs register differently
• Finding supermarkets difficult — lighting, shelving, movement, music and choices arriving in a single space
• Several people speaking at once at a family gathering, and needing to step out of the room rather than any one voice

For many people these adjustments happen gradually and quietly — clothing changes, light changes, a slow drift away from places that have become difficult — sometimes before the underlying pattern has been named at all.

Reduced sensory tolerance does not mean someone is being over-sensitive or difficult. Everyday input may simply require much more processing when symptoms are worse. The person reacting to the light or the noise is responding to what the input currently feels like, not exaggerating it, and not making a fuss.

It is also not the same thing as disliking noise or preferring calm, which are matters of taste. Sensory sensitivity is a change — environments that were once neutral becoming demanding — and it is the change that makes it a symptom rather than a preference.

None of these treat anything — they are ways of spending less on input that does not need to be spent, and they suit different people differently:

• Reducing unnecessary background noise — turning off a television nobody is watching, keeping one room quieter
• Dimmer or warmer lighting where that is preferred — lamps rather than overheads where practical
• Sunglasses or an eye shade where comfortable, indoors as well as out
• Earplugs or ear defenders if personally useful — some people use them for specific settings only
• Fewer simultaneous inputs — one activity at a time rather than a screen, a conversation and music together
• Advance warning before touch, where contact is part of daily life or care
• Quieter spaces when there is a choice — a side room at a gathering, a corner table, a garden
• Shorter visits, with leaving early treated as normal rather than as an apology
• Asking for one person to speak at a time when several people are present

These are options to take or leave, not a programme. Many people stay in settings they find difficult when it matters to them — a child's concert, a wedding, a friend's kitchen — and reduce input elsewhere to make room for it. Adjustment is about choice and flexibility, not withdrawal from life.

Sensory sensitivity occurs across the whole spectrum of ME/CFS, and its shape differs rather than simply scaling up:

• Mild — sensitivity may appear mainly around busier environments or during periods of worse symptoms, and be worked around with seating choices, quieter times or a recovery period afterwards
• Moderate — tolerance may be more consistently limited, with lighting, noise and busier environments needing more regular planning around
• Severe — the home itself may need to change: lighting kept low, one room kept quiet, visits short, sound and light decisions becoming part of daily life
• Very severe — even low levels of light, sound, touch or communication may be difficult for some people; sound, contact and light may each need to be kept to a minimum, with communication shifting to gesture, writing or a single word

At every level, reduced tolerance for input does not mean reduced understanding. Someone struggling to tolerate sound or light is still present, still following, and still the same person — the input is what has changed, not their interest in the people around them.

Sensory sensitivity can be one of the lonelier parts of ME/CFS, because the difficulty is with the ordinary furniture of life — light, sound, other people's cooking, ordinary rooms. It is also one of the most practically adjustable. Knowing that lighting, noise and busyness can be changed, and that needing them changed is reasonable, tends to make the difficult days easier to plan for without turning every outing into a negotiation.