Some people notice that a smell that never bothered them before now seems to set off their head. Perfume in an elevator, cleaning spray at the gym, fryer oil near a checkout line, or fresh paint can all feel different in the days after a crash. This note explains how to keep a plain record of those moments so you have something concrete to bring to an exam in the St. Louis area.
Nothing here is a diagnosis. Changes in smell after a head injury can come from many causes, and only an examiner can sort out what is going on. What you can do is write down what you noticed, when it happened, and what happened next.
Why smell gets a closer look
The nose and the brain are closely linked. The nerves that carry smell information connect to areas of the brain that also handle mood, memory, and how we register discomfort. A knock to the head can affect those connections in different ways for different people, and sensitivity to odors is one of the things people describe. Some find that strong smells feel heavier than usual. Others notice that a smell they once liked now makes them feel queasy or tight in the temples.
Setting up a simple odor log
Use a notebook, a notes app, or any place you can write quickly. Each time you notice a smell that seems to change how your head feels, write one line. Keep the entry short enough that you can finish it in under a minute, since long entries are hard to keep up with on a bad day.
A useful line has four parts: the date and time, the place, the smell as best you can describe it, and what your head did next. For example, you might write that a cleaning product in a store was strong, that you felt pressure behind one eye within a few minutes, and that you stepped outside. You do not need exact words for smells. Words like "sharp," "sweet," "smoky," or "like a hot pan" are enough.
Common places to check
Many people find their list grows in the same few places. Grocery aisles with cleaning supplies, laundry detergent, air fresheners in shared spaces, restaurant kitchens, and gas stations are frequent examples. Workplaces with printers, markers, or new carpet can also register. Keep a separate section in your log for home, since you spend the most hours there and may not notice a steady smell until you step out and come back.
Also note the smells you enjoy or that seem to cause no trouble. If coffee, bread, or a particular soap smells fine, write that down too. A short list of smells that did not bother you gives an examiner a fuller picture than a list of problems alone.
Noting the other details
A smell alone rarely tells the whole story, so pair each entry with a few basic facts. Write down how long you were in the space, whether you were walking or sitting, whether the room had good airflow, and what you had eaten or drunk in the previous hour. Note whether you had taken any medicine that day and what it was, without guessing at its effects. Record how much sleep you had the night before, since poor sleep can make almost anything feel worse.
Track how long the feeling lasted. Did it fade once you left the room, or did it carry into the evening? Did it come with nausea, a change in balance, trouble focusing, or a new kind of headache? Write those details down as they happened. If you cannot remember something, leave it blank rather than filling it in later with a guess.
Bringing the log to your exam
Before your visit, read through the log once and pick out the three or four entries that seem most important to you. Keep your original notes intact, then make a one-page copy with the dates, places, and short descriptions. Bring the original too, so the examiner can see the full record.
When you sit down, you can say something plain and accurate, such as that you have been keeping notes on smells that seem to make your head worse since the crash. The examiner will decide what questions to ask, what to check, and whether any further testing makes sense. Your job is to make the record easy to read, not to explain what it means.
If smell changes come with severe symptoms, follow the urgent guidance shown on this page. Otherwise, a steady log is one of the most useful things you can carry into an appointment.