Most depression intake forms ask about current medications, alcohol, family history, and sleep. Very few ask whether your head has ever taken a serious hit. So the ladder that slid out from under you in 2011, the rear end collision at the stoplight, the season of high school football where you got your bell rung twice, none of that reaches the chart. Months later a prescriber reads the chart, sees a mood that has not budged on two medications, and has nothing in front of her to suggest anything unusual is going on.
That gap is worth closing. A history of impacts to the head does not change what depression feels like from the inside. It can change how a careful clinician thinks about pacing, about what else to rule out, and about whether adding a third pill is really the next move.
What a clinician is listening for
When someone does ask about an old injury, they are not trying to date it to the week or assign fault for a crash. They are listening for a sequence. Did the flat, foggy, short tempered stretch begin in the weeks and months after the impact, or had it been in place for years before it? Was there a period afterward when light and noise felt like too much? Did your sleep change shape, so that you drop off fine and surface at three in the morning, or cannot get down at all? Those details turn a mood complaint into a timeline, and a timeline tells a prescriber more than one snapshot of how bad this particular week has been.
They are also listening for the symptoms that tend to travel alongside low mood after an injury: losing the word you were reaching for, losing the thread of a conversation you were enjoying, headaches that show up in the late afternoon, a temper your family noticed before you did. On its own none of that proves anything. It is context. Context is exactly what gets dropped when depression is handled as a single line item on a problem list.
How to raise it when nobody asks
You do not need clinical vocabulary, and you do not need to argue a case. Three plain sentences will do, and they work better written down the night before than improvised in the room. Say when the injury happened and what happened. Say whether you blacked out, felt dazed, or vomited afterward, and say so if you genuinely do not remember. Then say what shifted in the weeks that followed, in concrete terms: you stopped reading books, you began sleeping on the couch, you started snapping at your kids over the dishwasher.
Bring paperwork if you have any. An emergency department discharge sheet, a note from an athletic trainer, an insurance claim, even a photo of the car, any of it spares you a debate about whether the event was serious enough to count. If there is no paperwork, which is the ordinary situation, say that plainly. Someone who takes histories for a living is used to working from what the patient remembers.
Then ask one question before you leave the room: does any of this change the plan? A no with a reason attached is a real answer, and you can work with it. What you are trying to avoid is a plan built on a record that never knew about the accident at all.
What the history means, and what it does not
Here is the careful version, because the loose version gets sold to people. A history of head injury sits on the list of things associated with depression that proves stubborn against medication, which is roughly what clinicians mean when they say treatment resistant. That makes it a risk factor, a reason to take the case seriously and to look harder at what has already been tried and at what dose. It is not a reason to receive any specific treatment. A concussion from years ago does not, on its own, make ketamine or esketamine the right next step, and any program treating your injury as the entry ticket has the logic inverted.
What the history can legitimately do is reorder things. It may prompt a referral for a sleep evaluation before another medication trial. It may explain why a drug that leaves most people mildly drowsy flattened you for a month. It may be the reason a clinician goes back through the old trials and finds that two of the three were abandoned at a starting dose after ten days, which means they were never really trials at all. For a model of how to lay that history out before a visit, Brain Recovery Centers has published a page written for people whose low mood dates to an accident, and a quiet evening is enough time to get through it.
None of this is urgent in the emergency sense. It is the kind of thing that keeps getting postponed because the appointment is short and the form did not ask. Put it on the list anyway. If your mood has been stuck and your record has a hole in it where an injury should be, the people trying to help you are working with less than they need.