What it means is, when she sat in a restaurant in years to come, 10 years to come, 15 years to come, or she's on the beach, every so often she's going to start rubbing her skin, and out of there will come a piece of that shrapnel.
Significa che quando si siede in un ristorante nei prossimi 10, 15 anni, oppure in spiaggia, di tanto in tanto si gratterà la pelle e verranno fuori pezzi di quel proiettile.