People expect dissociation to be dramatic — losing hours, waking up somewhere else. Most of it is not. Most of it is the conversation you were in going slightly flat and far away while your face keeps nodding.
What it feels like
The room loses depth, like a photograph of itself. Sound arrives with a delay. Your hands look like objects. You can still speak, and what you say is fine, and none of it feels like it is coming from you.
Some people describe watching from up and behind. Some describe a glass wall. Many describe nothing at all, because the absence is the point — you cannot notice being absent while you are absent. You notice afterwards, from the gap.
What it is for
It is an exit when there is no exit. When something is too much and you cannot fight it or leave, distance is the remaining move, and the mind is very good at producing distance.
This is why the goal is not to stop. Dissociation kept a lot of people functional through things they had no other way to survive. Treating it as a symptom to eliminate misunderstands what it did for you, and tends to produce a person who dissociates and now also feels ashamed of it.
What changes instead
Two things. First, range — being able to stay present in situations that used to require leaving. That comes from the ordinary window-widening work, slowly.
Second, and sooner, choice. Noticing you are going before you are gone. There is almost always a signal: a specific narrowing, a sound change, a particular numbness in the hands or face. Learning yours takes a few weeks of attention and it is the single most useful thing in this territory, because a state you can see coming is a state you can do something about.
Coming back
Sensory and specific beats reassuring and general. Name five things you can see, out loud if you can. Push your feet into the floor hard enough to feel the resistance. Cold water on the wrists. Something strongly flavoured. Say the date.
These work because they give the system data through channels that are still open. Telling yourself you are safe usually does not, because language is one of the first things to go.
When to get help sooner
If you are losing time in chunks, finding evidence of things you do not remember doing, or experiencing yourself as more than one person, that is a different and more specific picture and it needs a clinician with actual dissociation training — not a generalist, and not a coach. It is treatable and it is badly served by improvisation.