The Mid-Western Regional Hospital in Limerick has appealed to members of the public not to attend its emergency department unless it is absolutely necessary due to a surge in attendances.
A total of 45 patients were seeking help at the hospital's emergency department this morning.
The Health Service Executive says extra ward rounds are being put in place and extra beds are being deployed to try and clear the backlog.
The executive says the reason for the rise in admissions is not clear.
It has asked members of the public not to attend the emergency department unless it is a genuine emergency, and to attend their GPs, who have also been alerted to the situation.