Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services or go to an emergency department if swelling makes it difficult to breathe or swallow, spreads into the neck or around an eye, or is accompanied by confusion or severe illness.
These signs may indicate that an infection is affecting the airway or spreading beyond the mouth.
Seek urgent dental care if you have rapidly increasing gum or facial swelling, severe dental pain, fever with swelling, difficulty opening your mouth, or a painful lump that may contain pus.
Arrange a routine dental appointment if your gums repeatedly bleed, remain swollen, have receded, or if bad breath continues despite cleaning.
You should also arrange an assessment if an adult tooth feels loose, your bite has changed, or you notice pus around a tooth.
Every sign above is quoted from the sofidex article on Gum disease. If you are not sure, err upward — it is always reasonable to be checked.