Hello girls, could you tell me if I should see a dentist? The older so…

Hello girls, could you tell me if I should see a dentist? The older son has a kind of abscess (pus-filled bump on the gum) in his last tooth. It popped open at night, do I need to go to the dentist to remove the tooth? Or can I just breathe easily and simply rinse more often (chlorhexidine, chamomile)?