After a head injury
Mood Changes After an Old Head Injury
The story usually starts small, and a long way back. You hit your head in a crash, or a fall off a ladder, or a game, or a cabinet door on a bad morning. Maybe somebody checked you out, maybe nobody did. Maybe a doctor said the word concussion, maybe no one said anything at all. The headache faded inside a week, you went back to work, and you filed the whole thing away as finished.
Then a few years go by and you are a slightly different person, and nobody can say exactly when that happened.
What people actually describe
When we ask people what changed, they almost never lead with sadness. They lead with a shorter fuse. Traffic gets to them in a way it never used to. A kid knocking over a cup produces a reaction that embarrasses them an hour later. They describe flatness more than grief, a sense that the volume on good things got turned down while the volume on irritation got turned up.
The rest of the list comes up over and over. Losing the thread in the middle of your own sentence. Reading a page twice and retaining neither pass. Getting worn out by noise, crowds, fluorescent lighting, a restaurant at seven o'clock on a Friday. Sleeping badly in a new way, either unconscious by nine or wide awake at three. Words going missing mid thought. Small decisions feeling like lifting something heavy. A lot of people tell us they quietly stopped doing things they used to enjoy, not because the interest went away but because the day afterward was not worth it.
Written out, that list looks like depression, and often it is depression, at least partly. It can also overlap with what some people carry for a long stretch after a head injury, and the two sets of complaints sit right on top of each other. Sorting out which is which from a list on the internet is not possible, and that is not a failure on your part.
Why it gets blamed on something else
Several things conspire to keep an old impact out of the conversation. The gap in time is the biggest one. If the hit was in 2014 and your temper changed in 2017, almost nobody connects them, including the person living it.
Life also supplies better explanations, and they all sound reasonable. A divorce. A job that got worse. A parent who got sick. Turning forty. Any of those will absorb the blame without anyone questioning it, and in fairness any of those can genuinely lower mood. The problem is that a satisfying explanation tends to end the inquiry.
The imaging adds to the confusion. A normal scan in an emergency room is reassuring, and it is also narrow, because that scan is looking for bleeding and fractures that need attention within the hour. It was never designed to say anything about why your patience is different three years later. People hear the word normal and reasonably conclude that the head part of this is closed.
Then there is the shape of a fifteen minute appointment. You lead with whatever feels most urgent, which is usually mood or sleep. Nobody asks whether you have ever been knocked unconscious, and there is no natural opening to bring up a motorcycle wreck from six years back. So it never reaches the chart, and every plan that follows is built without it.
Why the history is worth writing down anyway
Let us be careful about what an injury history does and does not mean. It is not a diagnosis. It does not point toward any specific medication or procedure, and a bump on the head in your past is not a reason for anyone to start you on a particular treatment. What it is, is context, and context changes the order in which a careful clinician looks at things.
What the research actually suggests is narrower than it sounds: people who took a hard knock to the head years earlier more often find that the opening round of antidepressants does less for them than expected. If you have already been through a couple of antidepressants without much change, that history is an argument for widening the workup rather than writing a fourth prescription on the same theory. Sleep apnea is worth ruling out, and it shows up often enough after a crash to deserve the question. So do thyroid problems, untreated chronic pain, and vision or vestibular trouble that leaves you feeling vaguely awful all day without ever announcing itself as a headache.
So write it down before your next appointment. Every impact you can remember, with a rough year next to it. Whether you lost consciousness, even for a few seconds, and whether anyone told you that you seemed off afterward. What changed in you, and roughly when. What you have tried since, at what dose, for how long, and what actually happened on it. Bring it on paper. Fifteen minutes goes much further when you are not trying to reconstruct a decade on the spot.
A clinic here has put its own version of that list where anyone can read it. Brain Recovery Centers hosts a page for people whose mood shifted after an accident, and it gives you a decent sense of the ground a careful intake should cover. We are an editorial team and not a clinic, so we have no way to tell you what is appropriate for you, only what a reasonable conversation looks like.
What we can say is this. If you have been quietly measuring yourself against who you were before one specific day, that comparison is information, not self pity. It belongs in the room with whoever is treating you, and it belongs near the top of what you say.