Running out of beds
Health bosses say it is almost 100% full all year round, and an outbreak of illness could leave them stretched.
The short-term plan is to cancel non-emergency surgery and send patients home early.
But the prospect of a beds crisis is worrying vulnerable islanders.
The man in charge of Jersey's General Hospital says he worries day and night about it running out of beds for patients.
Andrew McLaughlin says his biggest concern is whether they could cope with a significant outbreak of illness this winter.
He made the comments to a hearing of the health Scrutiny panel.
Mr McLaughlin said: "It's an issue which I think about when I go to sleep each night, and again when I wake up in the morning. It's a constant battle. Demand is increasing year on year and we are full. We're at almost 100% capacity all year."
He said an interim solution is to ease the pressure by trying to squeeze in more beds and to send patients home from hospital sooner where possible.
He also highlighted the need for more single rooms with en suite facilities for patients suffering from bugs to reduce the risk of cross-infection.