Early signs of periodontal disease include red, swollen, or tender gums that may bleed when you brush or floss. You might also notice that your gums are receding, making your teeth look longer than normal. Persistent bad breath or a bad taste in your mouth can also be indicators. Loose teeth and changes in the way your teeth fit together when you bite are further signs that should prompt a visit to your dentist. Early detection and treatment are crucial to managing periodontal disease effectively.