University Hospital Kerry is currently experiencing significant overcrowding.
The South/South West Hospital Group says it's been that way for the past 24-48 hours, due to increased patient attendances.
It says the hospital's emergency department is currently extremely busy.
The group is advising people to stay away unless it's a genuine emergency.
Management want to keep ED services for patients who need them most, and are asking people to consult with their GP before going to the hospital.
People will be treated as a priority if they are seriously injured or concerned that their life is at risk.
Staff and management are working to prioritise the discharge of patients as soon as possible.