UHG is under pressure today, with 64 patients on trolleys.
It's the second most overcrowded facility in the country, according to the Irish Nurses and Midwives Organisation.
The most overcrowded hospital is University Hospital Limerick, where 120 people are waiting for a bed.
Across the country 506 patients are on trolleys.
There are no bed problems in Portiuncula Hospital where there are no patients waiting on trolleys.