Why Am I So Sensitive to Certain Smells

This page reflects our understanding of mental health topics as of 2026. If you are reading this at a later date, some details may no longer be current, so please verify anything important against up to date sources. If you notice anything that needs updating, we would welcome you letting us know.

A coworker's perfume gives you a headache within minutes. The smell of certain foods cooking makes you feel sick or desperate to leave the room. Cleaning products, scented candles, or a crowded bus can feel overwhelming in a way other people do not seem to notice. You may have been told you are fussy or dramatic, but the reaction feels very real and hard to ignore.

Smell sensitivity is common, and it has many possible causes. Some are medical, some are linked to anxiety or past experiences, and some reflect how your brain processes sensory information.

It Could Be a Lot of Things

Migraine. Sensitivity to smells is a common migraine feature, and strong odours can trigger attacks. Many people with migraine also notice sensitivity to bright lights and sound.

Pregnancy and hormonal changes. A heightened sense of smell is common in early pregnancy, and some people notice changes across their menstrual cycle or during perimenopause.

Illness and medications. Sinus problems, recovering from a virus, and certain medications can change how smells are perceived, sometimes making them stronger or distorted. Sudden changes in smell should be checked by a doctor.

Anxiety and stress. When the nervous system is on high alert, all the senses can feel sharper. Stress can also bring on nausea, headaches, and stomach aches that make smells harder to tolerate.

Trauma. Smells are closely tied to memory, and a scent linked to a painful experience can bring a rush of fear or distress, as described in Why Do I Feel Triggered by Certain Sounds or Smells.

When It Looks More Like Autistic Sensory Sensitivity

Many autistic people experience sensory input more intensely than others. Smell is one of the senses that can be affected, sometimes along with sound, light, touch, and taste. This is a difference in how the brain processes sensory information, not a matter of being picky.

Signs that autism may be part of the picture include:

• Sensitivity to smells has been present since childhood, often with strong food preferences based on smell or texture.
• You also find certain sounds, lights, or textures overwhelming, such as loud noises.
• Busy, smelly environments like shopping centres or public transit leave you drained or on the edge of shutdown.
• You notice smells that others do not seem to detect at all.
• Your sensitivity varies with stress and tiredness, getting worse when you are already overloaded.
• You also relate to other autistic traits, such as preferring routine or finding social situations tiring.

Some autistic people are under-responsive to smell instead, or seek out particular smells because they are calming. Sensory differences can go in either direction.

What Can Help

• Identify your triggers. Noting which smells bother you most, and when, helps you plan ahead.
• Carry a comfort scent. A small item with a smell you find calming, such as a familiar lip balm or a scarf, can help mask difficult odours.
• Adjust your environment. Unscented products at home, good ventilation, and choosing seats away from kitchens or heavy fragrance can reduce overload.
• Ask for accommodations. Many workplaces support scent-reduced policies or seating changes when asked.
• Manage overall load. Rest, breaks, and quieter time lower your baseline, making smells easier to cope with.

Getting Support at Pacific Maple Psych Centre

If sensitivity to smells is affecting your work, relationships, or daily comfort, understanding the cause can make a real difference. An adult autism assessment can explore sensory differences alongside other traits, and therapy can help with anxiety, trauma-related triggers, and managing sensory overload.