When you have seen something terrible, your body and brain may be a little tense in the following days.

It is not uncommon for memory images to appear involuntarily and for people to have difficulty sleeping, Filip Arnberg explains.

- For many, it spins a bit in their head the first few days.

Among other things, he encourages people to talk to others about their feelings, even later when the event no longer feels as relevant.

In the clip: the psychologist's advice on what you can do about your discomfort.