Almost all of this happens at night
Everything here is general information, not a diagnosis and not medical advice. If something about your sleep, your mood or your thoughts is worrying you, that is a moment for a professional, not a website.
Ask a hundred people when it tends to happen and you will get one answer with small variations: late, tired, alone, in bed, phone in hand.
That is boring, and it is extremely useful — because a problem with a time attached is much easier to work on than a problem about who you are.
Why late is different
Two things stack up at the end of a day.
The first is that self-regulation is worse when you are tired. Whatever you want to call it, the capacity to override an impulse is measurably weaker at 1am than at 1pm, in almost everyone.
The second is that late at night is when people are alone with the feeling they have been outrunning all day. Boredom, loneliness, whatever the day left. Nothing else is competing for attention any more.
Neither of those is a character flaw. Both of them have practical answers.
What actually shrinks the window
Go to bed before you are too tired to decide anything. This is the whole intervention, and it sounds too simple to matter. The window between "tired" and "asleep" is where nearly everything happens; the goal is to make that window short.
Deal with the phone before you are in bed, not once you are in it. Decisions made standing up in the hall are different decisions from those made lying down in the dark.
If you cannot sleep, get up. Lying awake in bed for an hour is the exact condition this thrives in. Get up, sit somewhere else, be bored somewhere that is not the place associated with it.
Notice the ones that are not really about wanting it. A lot of late-night episodes are not desire at all. They are a way of not going to sleep, or not being alone with a bad day. That is worth knowing because it changes what would actually help — and what would actually help is usually smaller and duller than you think.
Track it once and you will see it
Two weeks of logging when it happens is usually enough for the pattern to be undeniable, and seeing your own times written down is far more persuasive than reading someone else's average.
Once you know your hour, you can plan for it — one sentence, written while you are calm, about what you will do when that hour arrives. That is a much better use of effort than deciding, again, to be more disciplined.
Questions about this
Why does it almost always happen at night?
Two things stack up at the end of a day. The capacity to override an impulse is measurably weaker when you are tired. And late at night is when people are finally alone with whatever feeling they have been outrunning since morning.
Neither is a character flaw, and both have practical answers — the main one being to make the window between tired and asleep as short as possible.
