Hello,
You can use dental floss or interdental brushes for cleaning any food lodgement.when you press your gums gently if there is any pus coming, there is a problem with your gum health and you will need a thorough check up and treatment .As there are many factors to examine ur oral cavity in-person Pls visit nearby dentist for proper oral hygiene instructions n to restore ur gums health .
Next Steps
Pls visit nearby dentist ASAP