Red, swollen, or tender gums
Gums that bleed when brushing or flossing
Persistent bad breath
Receding gums
Teeth that look longer than before
Loose or shifting teeth
Pain when chewing
Pus between teeth and gums
Changes in how your teeth fit together when biting
Sensitive teeth or gums
Gums pulling away from the teeth
A bad taste in the mouth that does not go away
Deep pockets between teeth and gums
Frequent mouth infections