Betsi Cadwaladr University Health Board says it's "very sorry" that Haydn Valentine had to wait five hours to be seen at A&E.
This is not the way we expect children to be cared for in the emergency department and we are looking into the concerns raised by Mr Valentine.
All patients are thoroughly assessed after they have arrived in the department. Those needing immediate urgent care are given priority, which at busy times may delay treatment for others.
The spokesperson added that they've encouraged Haydn's father to contact them directly.
Our staff work hard to ensure that patients get the care they need, and at busy times they may have to concentrate on treating seriously ill patients in other areas of the emergency department.
Medical staff were on duty in the department throughout last Tuesday, and were making sure that they continually prioritised patients according to their clinical need.
More top news
A retired businessman from Newport has built up Britain's biggest mini-bar - even though he doesn't touch a drop
A speed camera in Cardiff could be Britain's busiest. It's caught 13,624 drivers in its first six months since becoming fully operational
A decent day today, BUT Autumn is about to make an entrance - at last!